“Sit, Trish!” Jenna commands, even pointing an authoritative finger down before her.
    The black leather collar sits snugly around Trish’s neck as the stepmother hesitates, blushing slightly. Slowly Trish sank down to sit as directed.
    Jenna holds back her snicker as she thinks to herself, ‘Good dog.’
    “Are you sure?” asks Trish, looking uncertainly to Jenna. 
    But Jenna nods her head, practically smiling ear to ear. “Leave it to me. I’d be happy to do the laundry.”
    Trish crossed her arms, sitting awkwardly on the couch that she’d been so comfortably lounging in before. Her suspicion was obvious, since Jenna hadn’t volunteered to do a single chore in the two weeks she’d spent with her stepmom. Even offering to sit in the living room and watch TV with Trish had raised an eyebrow, but Jenna just needed to be around Trish and wait for an opening. As soon as they heard the ding of the washing machine Jenna knew she had her chance.
    No sooner had Trish gotten up from the couch before Jenna leapt to her feet and declared she would do the laundry. And when Trish gawked in surprise, Jenna had been able to bark her command for Trish to sit.
    Seeing the confusion on Trish’s face as she sat on the couch had been perfect. And she was so thrown off that Trish hadn’t even realized that Jenna had given her an order like she was a dog. It was such a delicious prank, and Trish was none the wiser.
    “Okay, you can do the laundry.” Trish chewed on her lip, clearly trying to figure out what was wrong with this situation. Her hand crept up to her throat and toyed with the collar, her fingers caressing the faintly glowing green gem at the front. “It was supposed to be my turn, though,” she said, starting to rise up from the couch again.
    But Jenna quickly held up a finger and said, “No. Stay, Trish.”
    Trish’s fingers tightened on the collar. She dropped back down onto the plush couch. 
    ‘That’s two commands,’ Jenna thought with glee. Perhaps Trish really would make an obedient pet if she were actually a dog. But for now Jenna was content with getting away with her prank.
    “Like I said, I’ve got the laundry this time. You just stay put and let me handle it.”
    “Okay,” Trish said uncertainly. She slid back into the pillows on the couch like she was getting comfy, but her eyes kept following Jenna as she quickly left the room.
    Once she was out of view Jenna hopped up in the air and pumped her fist. Deep down she knew it was a dumb petty thing, and yet tricking Trish into wearing a dog collar and giving her pet commands was sending a surprising rush of adrenaline through her. To avoid pushing things Jenna was only going to do it once or twice. Just to have a memory to savor forever.
    But already Jenna knew she’d be pushing this prank as far as she could go with it. Her mind was racing, trying to remember all the cliche dog commands she knew from movies and shows. She’d never had a dog and couldn’t think of much more than sit or stay. There was also roll over, but how the hell was she going to casually drop that into a conversation with Trish?
    And it wasn’t enough just to say dog commands at her. Jenna knew the important ingredient in this thrill was somehow getting Trish to go along with the command. That she’d been able to tell Trish to sit and stay and her stepmom had done it, unknowingly behaving like a good pet for her.
    “Gotta look up more commands,” Jenna whispered to herself as she headed upstairs. There had to be a way to work some of them in. She got halfway up the stairs when she suddenly paused. Shit, she’d promised to do the laundry. Jenna had been so eager for any chance to work in her dog command that she’d said whatever had been necessary. Her first impulse was to say fuck it, except if she didn’t do the laundry then Trish would get pissed at her, and that would make any future pranks more difficult.
    So with a groan Jenna went back down the stairs and made her way for the laundry machine, only regretting her prank a little bit. It just meant she’d have to make her next opportunity even more delicious.

~ ~ ~

Trish looked absolutely floored when Jenna declared she’d be taking care of dinner. Her disbelief faded a bit when Jenna called in pizza instead of cooking, but by the time it arrived Jenna had set the dining room table up with plates and glasses for the two of them. 
    “I was sticking to a diet,” Trish mumbled, and Jenna rolled her eyes at what was obviously meant to be a dig at her own weight. But then Trish grinned and said, “Screw it. I can have my cheat day early.”
    “That’s the spirit,” Jenna said with a fake cheerful smile. As Trish went to get a chair Jenna quickly slid one out and pointed down at it. “Here you go. Sit, Trish.”
    Trish’s hand froze at the chair she’d been reaching for. She blinked at Jenna for a moment, then slowly blushed as she sat down in the offered chair and let Jenna push her in. Jenna gave a condescending smirk from behind Trish as she silently mouthed the words, ‘Who’s a good girl?’ 
    She’d spent an hour racking her brain trying to think of how to call Trish a good girl without arousing suspicion but she didn’t have anything yet. So Jenna contented herself with what she’d gotten away with so far and grabbed herself a slice of pizza. She was about to head upstairs to her room, where she’d been eating all her meals by herself, but then she caught Trish’s eyes and hesitated. If she put so much work into setting up a dinner for them it would look suspicious if she bailed now.
    Begrudgingly Jenna took the place she’d set up opposite Trish and made small talk as they ate their pizza. It was actually a nice night, with the two of them laughing and telling stories. When Jenna went up to her room after she realized that she’d completely forgotten to look for chances to prank Trish more. She just shrugged it off and figured she’d have more chances later. Besides, having dinner with Trish hadn’t actually been so bad.

~ ~ ~

It was early afternoon the next day and Trish was curled up on the couch enjoying a reality show. Or one of those sitcoms pretending to be a reality show. Jenna groaned inwardly at the bad jokes as she listened from the next room, trying to work up the nerve to carry out her plan. There was no way it would work, but it was the best idea she had for something besides just exclaiming more Sits and Stays, which definitely would start becoming suspicious after two days.
    Taking a deep breath Jenna forced herself to walk into the next room with a fixed smile that was anything but casual. When she entered the room Trish’s eyes flicked over to her. Usually Trish would just give Jenna a side-eye as she kept her focus on the TV, only this time her stepmom actually muted the TV and turned to smile at Jenna. 
    “Hey Jenna, do you need something?”
    “Uhh…” Jenna choked. There was no way she could say it. It was too obvious. Too stupid.
    Trish cocked her head. “What is it?”
    Jenna gulped. “D-Do you want to go for a walk, Trish?” 
    She winced. It always sounded so cutesy whenever owners asked their excited dogs to go on a walk in the movies, but why in the hell did she expect Trish to do anything but stare at her like she was crazy?
    Sure enough Trish looked completely bewildered. Her hand crept up to the collar around her neck. Jenna was amazed her stepmom was even still wearing it after two days.
    “Um, sure Jenna. I could use some fresh air.”
    Now it was Jenna’s turn to gawk. It worked? Trish bounced up easily to her feet, looking as flawlessly gorgeous as ever even though she’d just been vegging out on bad TV. Jenna stared her up and down, then smiled. “So you wanna go for a walk?”
    Trish’s smile brightened. “Sure, it sounds like fun.”
    Jenna cheered inside her head. How the hell had that worked? Sure, Trish’s breezy acceptance wasn’t the same as a real dog bouncing and barking excitedly for a walk, but Jenna would take what she could get. And hey, with Trish out of the house Jenna would actually have a chance to watch whatever she wanted on TV. She was just wondering what was on when Trish trotted past her, glancing down at Jenna’s feet.
    “You might want to change into more comfortable shoes before we go, though.”
    Jenna spun around after her, sputtering. What was she talking about?
    Except it was obvious in hindsight. She’d asked Trish to take a walk, who naturally assumed Jenna had meant with her. Jenna whined. So much for TV.

~ ~ ~

“So that’s what you’re studying? I thought you were majoring in computers or something.”
    “Nah, I just like computers,” Jenna mumbled, wishing she’d changed her sneakers after all. They’d been walking for almost thirty minutes around the neighborhood, and even though she’d grown up here Jenna had never actually gone exploring the streets around her house. Her feet were starting to ache, and Trish had been doing nothing but making small talk the whole time. It was weird, but Trish was like a whole different person when they were actually talking. The previous two weeks they’d communicated in nothing but terse insults back and forth. Jenna wouldn’t be surprised if they’d talked more in the last two days than they had for the last two weeks.
    Jenna stuck her hands in the pockets of her hoodie and slowed down a bit, pretending to look at the scenery. It was unexpectedly tough talking to Trish like this. When they talked it was almost like Trish wasn’t some bitchy trophy wife who was out to ruin Jenna’s life. She was still vapid and weirdly obsessed with exercise, but there was also a lot more to her than Jenna had ever guessed. At times Trish actually acted nice. It almost made Jenna feel guilty for trying to sneakily treat Trish like an animal.
    But then Jenna remembered her TV that Trish had sold, and the strict allowance she’d stuck her on, and all the other rude comments she’d made since she’d married her dad. So Jenna smiled as she hung back behind Trish and held her hand out in front of her. She closed her fingers around an imaginary leash.
    The idea filled her with a giddy excitement. It was easy to pretend that she had Trish on a leash, connected to the weird dog collar she’d gotten her. It was childish, but Jenna couldn’t wipe the smile off her face.
    If only there was a way to push this prank further. Jenna had been brainstorming but had exhausted any possibilities she could think of. After all, it’s not like Trish was really her pet and willing to go along with it. There was only so many sneaky ways to give someone orders before they’d catch on. And considering how nice the last two days had been Jenna was actually reluctant to do anything to cause a big blowout with Trish. Since she’d been doing chores as an excuse to order Trish to sit and stay, and talking with her more, it was actually nice staying with her. 
    Still, Jenna couldn’t get that tantalizing fantasy out of her head. Of a nude Trish barking and begging on all fours, an obedient pet that was all hers. Jenna had gotten herself off at least four times today to that fantasy alone. There might have been a huge disparity between her tame, pretend commands to Trish and the perverted fantasies brewing in her head, but sneakily giving Trish commands fueled her libido all the same.
    Trish glanced back over her shoulder at her, and Jenna hastily shoved her hand in her pocket. Trish smiled at her before focusing back on their walk. Relieved she wasn’t caught, Jenna found her eyes drifting down to Trish’s toned ass in her tights. Why did her stepmom have to be so damn hot?
    It was almost too easy to imagine Trish naked. And once she had Trish naked in her head Jenna couldn’t stop her fantasies from having Trish get down on all fours and pant like a happy dog, shaking her ass invitingly. Did all people get sucked into a new kink as quickly as Jenna had gotten absorbed in pet play fantasies?
    There was an actual pain in her chest as Jenna realized she’d never get to live out any of this. That Trish would never be her happy sex pet. That she’d never walk Trish around nude on her leash. That she’d never get to throw a stick and have Trish crawl off to fetch it. Actually it would probably be a tennis ball. Trish had a ton of those with her tennis gear, after all.
    Jenna came to a full stop as inspiration struck her. If she was going to give up on her dumb prank then she’d go out with a bang.
    Noticing that she’d stopped, Trish looked back and cocked her head. “Everything alright, Jenna?”
    “I’m great,” Jenna said with a growing smile on her lips. “Actually, I was just thinking that I want to take you up on your offer to play tennis.”
    Trish broke into a huge grin. “I’d love to take you to the court! We can go tomorrow!”
    “Can’t wait,” chuckled Jenna, her eyes glued to the dog collar around Trish’s neck as more fantasies filtered through her thoughts.

~ ~ ~

The tennis ball went sailing over Trish’s head. She waved her racket and gave a cheery smile. “Don’t worry, I’ll get it. Keep at it, Jenna!”
    “That’s right…” Jenna heaved, sweat dripping down her face. “Go… go fetch… oh fuck.” She dropped the racket and grabbed at her knees, panting for breath. She tried to enjoy the sight of Trish happily running across the court to fetch the tennis ball, just as she’d planned, only the sweat was going into her eyes with a stinging irritation. Jenna wiped at her face and sighed.
    Her plan had been working perfectly at first. Tennis pro Trish didn’t even bat an eye as Jenna kept ‘accidentally’ whacking the balls way off the court so that she’d have to go fetch them. Although Jenna was having a hell of a time running around the court herself just to reach the ball in time to hit it over Trish. Wasn’t her stepmom supposed to be going easy on her?
    It meant that, while Jenna had plenty of fun shouting for Trish to fetch the tennis balls at first, now she was utterly exhausted and totally spent. All she could imagine was Trish’s condescending thoughts about Jenna being out of shape, and that was usually enough to fuel her to keep it up for another volley. After all, didn’t dogs usually have way more energy than their owners anyway?
    “Ready for another one?” Trish asked, already back in position. Her brunette hair was tied back in a ponytail with a visor to protect her eyes from the sun, and though Trish was sweating too it somehow still managed to look like beautiful sweat. It made Trish glisten like a model athlete ready for a photo shoot. Nothing like Jenna with her soaked T-shirt and sweat matted hair.
    “Sure,” Jenna forced herself to shout, when all she wanted to do was collapse to the ground. “Give me… your best shot.”
    Trish smirked. With a casual toss she sent the ball up into the air, then leapt up and perfectly hit it at the top of it’s arc. The ball careened towards Jenna, who was barely able to follow the ball close enough to lunge for her. Jenna swung hard and prayed. With blind luck the tennis ball hit the metal edge of the racket and shot up into the sky. The ball sailed up and over Trish’s head, landing on the next court over where it almost bounced into some old guy’s bald head. He shot them both a dirty look as Jenna winced.
    “Sorry,” Trish yelled, then raced off after the ball.
    Jenna finally dropped to the floor, smiling hazily as she watched Trish run. There really was something amazing about seeing Trish in motion. Her toned legs running with ease, her ponytail flying behind her. And the pleated white skirt she wore fluttering in the breeze, lifting up almost enough to tease a flash of her panties. 
    “That’s a good girl,” Jenna mumbled to herself. “Go fetch the ball, Trish. Good dog.” 
    Not that Trish had any idea. She was simply scooping up the tennis ball and then jogging back to their court. Jenna had enjoyed the chance to imagine Trish as her pet again, and seeing Trish in her element on the court was surprisingly fun. But Jenna was totally wiped, and she figured she’d taken this prank as far as it could possibly go. 
    Honestly Jenna was amazed that Trish had even worn the collar to go with her tennis outfit. Surely the leather loop around her neck must have been uncomfortable while playing.
    Trish was back on her side of the court, but didn’t stop there. She kept jogging and then leapt right over the tennis net as if it were nothing. Her white skirt flared up, and Jenna’s heart raced as she finally got the peek she was waiting for. Only Trish was wearing short white shorts under the skirt, instead of the lacy thong that Jenna had been fantasizing about. When Trish reached her she held out a water bottle that Jenna gratefully snatched up.
    She chugged on the bottle until she finally gasped for air. “Thanks, Trish.”
    Trish giggled. “You did great out there.”
    Jenna shook out her short wet hair and raised an eyebrow at her. “Are you kidding? I was barely managing to hit the ball.” Sure, her plan might have been to intentionally keep Trish chasing after the tennis ball, but if Jenna was honest only about half of those wild returns had been on purpose. The rest of the time it had been her own lack of skill sending the balls off for Trish to fetch them.
    “I meant you stuck with it almost an hour, and you’re clearly not an athlete.”
    Jenna sighed, waiting for the insult. Instead she was surprised when Trish patted Jenna’s knee and smiled.
    “I’m proud of you. You’ve definitely got a lot of heart.”
    Jenna was at a total loss for words. It had to be a trick, or an insult Jenna wasn’t understanding. Only it felt genuine. Trish was smiling with full sincerity. Warmth welled up in Jenna’s chest and she quickly looked away. All she could do was mumble a quiet, “Thanks.”
    To make matters worse Trish sat down beside her, and a shiver ran through Jenna as their shoulders brushed.
    “I know you’re not a big fan of me. I certainly haven’t been the best stepmom. Honestly I don’t even know how.”
    When Jenna glanced over at her she found Trish staring pensively off into the distance, her lips in a tight frown.
    “The truth is I never imagined myself having kids yet, much less an eighteen year old in college. You’re like half my age, and somehow I’m supposed to know how to take care of you?”
    “I can take care of myself,” Jenna mumbled out of habit.
    “I know, and that’s what makes it tough. I don’t know what I’m meant to do.” Trish pivoted onto her knees, turning to face Jenna. “I tried to be strict like my parents were with me, but clearly you hated that. We kept ending up yelling at each other or saying mean stuff and I didn’t know how to change things between us. But then the last few days you’ve really made an effort.” 
    Trish’s warm smile froze Jenna’s heart.
    “You’ve been helping with chores even when I didn’t ask, and you’ve been making an effort to spend time with me more. Even though you clearly aren’t a fan of tennis,” Trish giggled.
    “Well… you kept inviting me to play,” replied Jenna, finding it hard to meet Trish’s eyes. Here Trish was, thinking that Jenna had been making an honest attempt to connect with her. How would she react if she found out why Jenna had really been so helpful around the house? What would Trish do if she saw the perverted fantasies that were buzzing around Jenna’s head the last few days?
    “The truth was I had no idea what you did for fun. I don’t know anything about movies or video games or computer stuff. I thought I’d invite you to play tennis since it’s something I loved and did with my parents, but I think you took my invitations the wrong way. I couldn’t find a way to make it work. That’s why I’m so grateful for how you’ve been acting, Jenna.”
    Trish put a hand over her heart, while Jenna felt a nail go through her heart.
    “I promise I’ll try to be a better stepmom. I won’t push, and we can work out how we’ll live together this summer. And I promise to try to connect with you any way that you want. I swear I’ll do my best.” She reached her hand out to Jenna, and it was obvious that she really meant every word.
    Jenna’s guilt was like sandpaper scratching all over her. She hadn’t hated Trish, but she certainly had gotten plenty of delight at the thought of degrading Trish and treating her like a dog. Those fantasies had even turned sexual surprisingly quick. The perverted things she’d imagined doing to Trish still lingered in the back of her mind. 
    And all this time Trish had been trying to make an effort. Maybe she’d been strict and totally annoying, but it was dawning on her that Trish might not have been the total bitch that she’d made her out to be in her head.
    Jenna sighed. There was the slightest chance she’d been acting like a spoiled brat herself. Just a bit. But if she was going to stay with Trish for the summer then she could at least try to be better. Help around the house. Find a way to hang out with Trish. The last few days had actually been alright. Jenna just had to stop imagining that she was treating Trish like a pet. Put away those petty urges, and the awkward sexual fantasies, and just maybe they could get along.
    She really did resolve in that moment to be a better stepdaughter. But then Jenna looked up at Trish and her heart skipped a beat.
    Trish was on her knees, looking at her plaintively with one hand held out. And though Jenna knew she was making a heartfelt plea, it was utterly undeniable— Trish happened to look just like a dog sitting up with one paw out to beg. The collar was even still tight around her neck, that mocking gem shining. It was like Jenna couldn’t even look at Trish without imagining her as a pet anymore.
    And as a strong wave of need washed over her, Jenna couldn’t stop herself from reaching out to take Trish’s hand. “Okay, Trish. Let’s shake on it.” She grabbed Trish’s hand firmly, staring right into her eyes as she said, “Shake, Trish.”
    The joy was undeniable as Trish grinned and pumped her hand up and down. Just like a dog eagerly doing a trick for it’s owner. 
    Jenna hastily pulled her hand away, suddenly feeling dirty. Why was she lusting after her stepmom? And why was she still childishly treating her like a pet when just two seconds ago she’d been wanting to make a change?
    “Let’s head home so you can rest up,” Trish said, totally oblivious to the internal struggle inside Jenna. After all, why would she even suspect that Jenna was up to anything as strange as slipping her dog commands?
    Hauling herself to her feet, Jenna helped Trish pack everything else with her head hung low. All she could think about was all the times she’d gotten herself off imagining Trish barking and acting like a dog. How terrible of a person did she have to be to get off on that?
    Only, even as she wanted to be ashamed, a part of her still looked over longingly at the collar around Trish’s neck. 
    The collar. She just had to get Trish to stop wearing the collar, and then her weird brain would stop coming up with fantasies like these. All she had to do was avoid looking at Trish and get home as soon as possible.
    “Alright, let’s go, Trish.”
    “What’s that?” 
    Her anger and frustration at herself boiled over. Jenna stomped her foot and yelled, “Let’s go! Come, Trish!”
    Trish gasped. Her tennis bag fell from her hands and clattered to the floor.
    Jenna slapped a hand over her mouth. She hadn’t meant to shout, and she certainly hadn’t wanted to yell it like a dog command. It had just come out like that by accident.
    “I- I’m sorry. I’m just tired and-”
    “It’s okay,” Trish quickly said, waving her hands and making a show of smiling. “I know how it can be after a long match. Why… why don’t you get our stuff in the car? I’ve just got to run to the bathroom.”
    Jenna tried to apologize again but Trish ran off before she had the chance. She watched Trish go running off to the bathrooms, only glancing back once. Even at a distance it was obvious to see the distress on Trish’s face.
    “Fuck.” Now she’d done it. All that good will with Trish ruined because she had to be upset over her own dumb pranks. Still, she’d been able to smooth things over with Trish before, even if it was accidental. This time she’d just do it for real. Do her chores. Hang out with Trish. Actually talk to each other. Jenna could do that.
    She certainly wouldn’t be giving any more dog commands.
    And that thought only made her a little sad. Jenna gathered up their stuff and headed for the car, hoping that Trish hadn’t taken her outburst too hard.

~ ~ ~

Trish raced for the bathroom. Had Jenna noticed how weird she was acting? She glanced back and Jenna was standing right where she was, no doubt wondering what had come over the older woman. Trish was wondering the exact same thing.
    She burst into the bathroom and quickly checked that all the stalls were empty. Her body was buzzing, almost vibrating with anxious energy. Trish was set to explode. The feeling had come upon her out of nowhere. The worst part was that Trish somehow knew just what she was meant to do.
    Locking herself into the stall furthest from the door, Trish quickly flipped up her skirt and stuffed a hand into her shorts. Her pussy was dripping wet, her clit throbbing gratefully as her fingers rubbed desperately at it.
    She hadn’t even been horny before. Playing tennis with Jenna had been a blast, even if she barley knew how to play. It was seeing Jenna make such an effort to connect with her that had made Trish confess her own worries. And they’d both promised to be better to each other. Trish had been overjoyed.
    Then Jenna had snapped at her, probably exhausted and irritable, the poor thing, and suddenly Trish was horny. Not just horny, but right on the edge of orgasm. It felt like she’d been rubbing at herself for minutes, already working herself up to the breaking point.
    Trish had almost cum on the spot as Jenna had yelled at her. Her shout still echoed in Trish’s head now as she fucked herself like a pent up animal.
    “Come, Trish!”
    Trish groaned and rubbed faster.
    “Come, Trish!”
    Her other hand had been groping at her tits, but Trish needed more. She could sense it. So her hand slid up past her tits towards her neck, until her fingers found her necklace. The special one Jenna had given her. Her hand closed over the green crystal at the front and it felt warm in her palm. Made her feel wonderful, just as it had since she put it on. It was a sign that Jenna had warmed up to her, and every time she spoke with Jenna or spent time with her stepdaughter it felt like the necklace was buzzing against her skin, transmitting a delightful warmth right up into her head.
    Trish knew she shouldn’t be grabbing something so personal to Jenna as she fucked herself, and yet she couldn’t stop herself. It just felt so good, so wonderful, hearing Jenna’s voice speaking over and over in her head.
    Come, Trish. Come, Trish. Come, Trish.
    And then she came, her hips jerking and her body bursting in unmatched pleasure. Trish bit her lip to stop from crying out. She was left writhing against the bathroom stall, whimpering quietly as the intense orgasm slowly faded.
    Trish sighed and went limp, her arms falling to her sides. If she hadn’t been in a bathroom she would have been tempted to sink down to all fours. She shook off the odd urge, smiling to herself.
    She had no clue where the fuck THAT had come from, but Trish hadn’t cum like that in— well, for as long as she could remember.
    Trish stumbled out of the stall and over to the sink to wash her hands. As she saw her glistening face slick with sweat she couldn’t help but let her eyes linger on the pretty necklace. Wearing it just made things with Jenna feel so right. Like she wanted to be better for Jenna’s sake.
    “I’ll be a good stepmom for her,” Trish promised herself. It made her feel proud to declare something like that. Only Trish wondered why she felt horny at the thought of being good for Jenna. Must just be some lingering sensation from the surprise orgasm she’d needed so badly. Trish would have to figure out what the hell had come over her, if only so she could find out how to experience it again.
    Trish contemplated slipping back into the stall to see if lightning could strike twice, but then she thought of Jenna waiting alone by the car. She snapped to attention. She couldn’t leave Jenna waiting at the car like that. It was rude. So she raced out of the bathroom to get to Jenna, only realizing after she left that she’d forgotten to even dry her hands.