You stalk your way back down to your room.“Bitch, can't believe she put me in a fucking belt. What the fuck.”

You stomp around your room for a while before allowing yourself to calm down a little. A small voice chimes out from somewhere in the back of your mind. “Hey, just remember you pretty much did the same thing to her a while ago, and you barely knew her, she literally just went along with it out of stubbornness.”

Rather than arguing with yourself like a child you pause and take a seat on your bed. “That is fair, she's really just getting her own back here and in fairness its not like you're gonna be kept up all night by a surprise vibrator.”

You take you pants off and look down at the belt. It's fairly solid, probably one of the standard belts they sell, if it was tightened properly you imagine you'd feel it biting fairly tightly around round your thighs and hips and while you could definitely feel it because you were a bit of a bitch about it the belt was just not feeling as oppressive as it should.

You half smile as you look down, “Sorry Scar, maybe I cheated here but I'll go mental if I can't cum for a weak, so really, I'm doing you a favour by giving myself a way out.”

You feel a little bad about what your doing, especially since you remember seeing Scarlett that morning after you kept her on a vibration loop all night. But you push it out of your mind as you drift off to sleep for the night.

BRRRRIIINNNNNNGGGGGG

“...I'll never get used to that fucking alarm... ugh wow my feet are hanging off the bed, man I must have been moving around last night, b-” You reach up and knock the headboard of the bed, it's a lot closer than it should be.

“Hang on a sec...” You immediately put two and two together and jump out of bed.

“Holy shit.” It was one thing to see the difference in your chest after your first shop purchase but if there was still any doubt about the app it completely vanished.

You stare at your reflection and couldn't hide your smile. You could see definition in your arms, your shoulders and back looked good, your stomach looked toned, not like each individual ab but you could see some definition and you were happy with that. As you slowly look down your body a realisation dawns on you and a very unfamiliar bite around your hips and thighs suddenly made itself apparent.

“Oh no.” Suddenly you are more grateful than ever you decided to give yourself some extra space last night.

You try pointlessly to slide your fingers in and around the belt which is now very firm on your hips, you do your best to control yourself when you realise you're no longer able to cheat your way through this punishment. Unfortunately this puts a damper on the rest of the time you spend checking yourself out and you barely get to appreciate your ass which is looking fantastic even partially obstructed by the belt. Your legs look exactly the way you'd always wanted them to with obvious muscle definition but not overly muscly.

You look fucking good and you know it, but unfortunately that was not what you were focusing on. You felt a little limited with your outfit choices, you couldn't go to the tight shorts because you were worried the outline of the belt would show through.

Fortunately for you because it was starting to get a bit colder you were able to bring out the grey sweatpants. Definitely not your first choice, but **** times right?

As you're pulling the pants up you get a quick look at the clock again and....”Awwww fuck.” You groan as you realise you don't even have time to look for a muesli bar you need to run if you want to avoid punishment again this morning.

You groan and shove socks on your pocket and hold your shoes in your hands as you barefoot jog your way down to the gym. Every step you take you feel the belt just rubbing on your hips, just an annoying reminder that you were stuck until Friday or later if Scarlett decided to be a bitch about it. Fortunately you make it, shoes in hand but technically on time.

Scarlett is predictably smug and Bec is actually impressed with how close you've cut it but you don't see Flick. You sit and put your shoes on as the other pair casually chat and then your eyes are drawn to the door. Flick slowly enters the gym not even bothering to try to pretend she's on time or anything, you can tell she knows she's in strife and isn't even going to try hide it.

She looks at the group and you look back and smile “Oh this is bitch is going to suffer.” you think to yourself remembering how you were struggling on the **** bike on Monday.

Almost like she read your mind Bec addresses her “You know what you've done and Issy is going to choose your punishment. But anyway we've wasted enough time waiting. Guys we're coming to the end of the semester and you've been doing this basic strength building program for a while. Once the next semester starts we will likely do less of this stuff but there will be more focus on tennis, you are welcome to keep doing gym but we might have to tweak some of your programs. But anyway that's for the future. Today we're starting with chin ups.”

Like most ladies chin ups had never been your strength and after a short warm up you and the rest of the team were all standing in front of the bar. You watch Bec step up and smash out 10 strict reps. You groan internally, of course the bitch can do chin ups and still barely be puffing. You pity Scarlett as she has to follow that performance.

You smile as Scarlett jumps up and grabs the bar. Her boobs bounce everywhere as she steadies herself and forces out her first rep. You watch her struggle hard as she squeezes out two more reps before dropping down, clearly unimpressed with herself. You move to step up when Flick places her hand on your shoulder

“Woah thicc, let me jump in first.” Flick puts her hand on your chest as she pushes herself forward.

“Chin ups must be easy when your chest and ass can double as an ironing board.” You're a little perturbed but you'll get her back later.

She jumps on the bar confidently and gets through 8 chin ups before struggling and not quite making the 9th . She seems fairly pleased with herself as she passes you on the way back.

“Well that's far easier to follow than Bec at least.” You shrug as you walk up to the bar.

You jump up and grab it. You've tried these exercises several time sin the past often to limited success but this time just feels different. As you pull yourself up its like you've become significantly lighter. You confusion quickly gives way to elation as you smash past your previous best of 4 and get to 10 quickly, while fatigued at this point you dig a little deeper and push on to 12 pull ups before eventually your arms fatigue and you drop.

You look around to mixed reactions from your teammates. Flick looks dirty at you knowing that she already started the shit talk and you're about to give it back to her, Scarlett looks very happy for you and slaps your ass as you walk past and Bec just nods and says “well done.”

You go through two more rounds where everyone attempts to do repeat what they got first round. Predictably Bec actually decides to work harder and improves through those sets, Flick gets progressively more tired and Scarlett can barely do a single chin up by the last round.

Your confidence grows as you complete two more sets of 10 and walk back towards Flick with a big smile, “You'd think being all skin and bones that these would be easy for you.”

“Bitch fuck off, these things must be filled with helium, that's literally the only explanation.” She gives your chest a squeeze angrily.

“Now now, don't be mad, I'm no doctor but I think yours just haven't had any attention and its hard for anything to grow without proper attention” You give her A cups a nice squeeze in return.

“Well I-”

“Are the pair of you actually feeling each other up in the gym right now!?” Bec cuts the conversation off immediately and you both realise that you are in fact just rubbing each others chest in the middle of the gym.

“Right Flick you're training with Scarlett and Issy you're with me.” You groan as you know you're about to be in for it.

You get exactly what you expect and for the next 30 minutes your back, shoulders and biceps are absolutely punished, but much to your delight while the work is hard you are able to keep up. Bec actually looks a little grumpy as the pair of you continue to up the weight and add supersets and drop sets but as much as it hurts you stay with her. Not only this but for the first time in your brief gym career you can really see the muscles in your arms and back move as you do the exercises.

As you finish your last set of 21's (points to anyone who knows how much these suck) you look over at Bec who is watching you with what can only be described as suspicion.

She approaches you as you put the weights “Let's go outside we need to chat.”

You walk out a side door, confused. “Am I in trouble?”

“I need you to be honest with me right now what are you on?”

“Excuse me? I didn't even have anything for breakfast?” Why she cares about what you had for breakfast is beyond you.

“No, PEDs, what are you cycling right now and do you know what you're doing? Is it D-bol, Tren, SARMS?” It's clear she's getting a little agitated but you aren't really sure why?

“What?”

“I saw you at the start of the year and without being a bitch about it you were a little chunky, you'd never done any weights and weren't fit and now you are keeping up with a workout that honestly I barely managed and its been what like 10 weeks? That's not a thing that happens. So I'm asking you how you did this.”

Suddenly it dawns on you, she thinks you're on steroids, which in reality is actually a reasonable assumption considering your overnight change. “OH, oh, you think I'm on steroids!?”

“If it walks like a duck and quacks like a duck, I'm pretty sure you've even got taller somehow!?”

“Taller? Surely not, honestly Bec I've never done gym before so maybe its just cause my body isn't used to it?” You lie, knowing that it's far easier to explain than 'I have a magic phone app.'

“Look maybe, but if you are using just tell me cause its not like I care I just need to make sure you aren't going to go mental and rage out on me or overdose and put yourself in hospital right before a game.” She sighs, you can tell she's just trying to look out for you and while you didn't want to be honest with her you did want her to know she could trust you.

“Bec I promise I'm not on any **** at all, not even cold and flu.”

“Alright, I believe you, besides not even **** explain how you got taller, Anyhow I think its time Flick was punished for coming late, don't you?” With that the pair of you walk back into gym and find Scarlett and Flick starting their stretch down.

“Ladies, ladies don't you think you're getting a bit ahead of yourselves.” They both look at you in confusion.

“Someone rolled in late so it's punishment time.” You smile as you look at Flick who was clearly hoping this would be forgotten. “Hmm I think we should finish with a plank. How long's fair Bec?”

“She's pretty fit and it is a punishment so how about 5 minutes?”

“FIVE FUCKING WHAT!? Four at absolute maximum.” Flick arcs up.

“Hmmm 4 minutes 30 and if you drop you have to restart. Also if your butt comes up too many times you start again as well.” You smile at her, you know she wants to argue but doesn't have much room to complain.

She rolls into position as pushes herself up onto her elbows and toes as you count her in. “Aaaannnndddd go.”

You watch her look fairly solid for the first minute and you know while she isn't a fantastic tennis player she is a good athlete, however during the second minute her fatigue shows and her butt begins to rise up taking stress off her core.

Without warning anyone you bring your hand down on her asscheek with a satisfying *SWAT* “Uh uh keep that butt down or we start again”

She turns to look at you angrily. “Bitch fuck off it was fine.”

*SWAT* “any time you turn to look at me you're cheating. Does anyone else want a go at this its actually very therapeutic?” You look at the others with a smile.

“Fuck you.” She says through gritted teeth.

She holds up strongly for the next minute and hits the 2 minute and thirty second mark before she starts to faulter again.

You smile and raise your hand again to 'encourage' her to fix her form when you are interrupted *SWAT* Scarlett reaches down in front of you and smacks flick on the backside. “Hey this is fun. Don't drop Flick it'd be a shame if we had to restart...”

You are confident you hear Flick swear under her breath but other than that she remains silent. She forces her way through the next minute but starts to shake a lot once she hits 3:30. You and Scarlett smile at each other as you spend the last minute taking turns swatting Flick and giggling. You can hear the sounds of her laboured breathing and her body strains at the 4:20 mark and you think shes going to give up but you count her down and she just makes it before dropping.

She gets up looking furious at the pair of you, but you quickly see that underneath her anger she's looking quite flushed. “I will get you back for this. Make no mistake, you too Scarlett.” Before she grabs her bag and rushes off.

Bec rolls her eyes at the pair of you and also walks off. You turn to look at Scarlett about to make a remark before you are cut off.

“Nothing like a good spanking to really get me in the mood. Maybe you and I should... oh wait you can't at the moment.”

Annnnnnnddddd just like that you were reminded of the tight embrace of the belt around your waist and your smile completely vanished. “Bitch I thought we were having a moment here and you go and bring that up.”

“Oh we were definitely having a moment and I enjoyed it.” She leans forward and gives you a quick peck. “But I know how you love to be in control. I am going to love riling you up all week and I'm pretty confident that you are going to beg me to let you out before Friday.”

Your gaze narrows as you make sure you enunciate every word “No. Fucking. Chance. If you think this is going to end the way you want you're very mistaken and I will be delighted to prove it to you.”

“Anything that gets you through the day. Also is it just me or are you taller this morning? Hmm maybe not I dunno, anyway I'm off to class you enjoy the rest of your day mwah.” She blows you a kiss as you leave.

You give her the long stare as she leaves, you can see she's got a big smile on her face and is clearly proud of herself also you think back to a few minutes ago, without hesitation she gave you a quick peck on the lips, in a public place. As annoyed as you are about the situation you cant help but smile as you can see Scarlett growing in confidence.