...where you get a bit distracted by the locals

Your local gym is fairly crowded today, since there was some kind of yoga event going on for the soccer moms trying to keep in shape, but you find space on one of the treadmills. You aren't exactly buff, but you have always kept in shape (since you had a huge girl crush on Isa), and your tight ass and belly were your pride and joy.

The opportunity for casual ogling was always welcome too. While the locker rooms were populated by horrifyingly unselfconscious old people, there was usually a solid group of in-shape hotties of both genders to look at. Your favorite pair was a cute but buff trans girl named Friday, and her friend Viridian, a complete bimbo who refused to do anything more strenuous than walk the treadmill. They both looked amazing in athletic shorts, and while Friday never got breast implants, her muscled pecs, super tight ass, and still sizable cock had left you drooling at her in the showers more times than you can count. Viridian had perky d-cup tits that just straight up defied gravity, and while she was slim she wasn't overly muscular, and her ass bubbled out divinely over a pair of thicc thighs. Your shy attempts at getting into either of their pants hadn't really gotten anywhere.

They were over by the exercise bikes, with Friday cajoling her friend about her lack of effort. You were about to slip on your cock ring to have some fun with them, when suddenly, a cock appeared in front of you on the treadmill's screen. You stared at it in bewilderment, before your head moved of its own accord down to start sucking on it.

It was the most delicious thing you had ever tasted, as you bobbed up and down. Your eyes darted all around, seeing that everyone else seemed to be unaware of this strange turn of events. You struggle to keep walking forward and suck the cock at the same time, until you start planting one foot right in front of the other like a runway model, and bob up and down in sync with your steps.

After a few minutes you feel the dick swell and slap the stop button on the machine. You ram the cock into your throat as far back as you can and guzzle down the spray of hot and sticky cum that explodes forth. You hold it there until you feel the cock slip away from underneath your mouth. A buzz seems to sound in your brain and you find yourself turning around and walking towards the men's locker room. You feel like something is off for a second but a feeling of rightness quickly washes it away when you enter.

A line of women filled the men's locker room, all wearing a dazed expression and you recognize most of them as the surplus yoga students you passed on the way in. Leotards and leggings were the outfit of choice, with a few like you in regular workout clothes. A few more trailed in after you, including Friday and Viridian, before the last girl turned mechanically and locked the door behind her.

As you rounded the corner into the main room, you saw a circle of women surrounding a naked dude. You vaguely recognized him as one of the ripped local "bros" that seemed to live at the gym and make fun of overweight people for trying to work out. He was currently having two twenty-something girls lick up and down his cock while the rest of the women stripped and started joining in pairs to pleasure each other. You quickly rush over next to a petite blonde girl and start stripping yourself, eager to join in the orgy. You were confused before but it all made sense now; you had come here to become part of Master David's harem and had to put on a show for him.

You turned towards your sister **** and kissed her on the lips, both of you moaning in pleasure. She groped at your tits while you reached down and fingered her neatly trimmed pussy. You kiss even deeper, tongues grappling and twisting together.

You were about to step up your game when something broke your reverie. "What the hell!? I didn't want a faggot in here!" You turn to see Friday standing red faced and looking crestfallen in front of your master. You feel compelled to speak up, "She isn't a faggot, master, she's just a different kind of girl."

Master David looks angry at this. "Shut the hell up and get this faggot out of here right fucking now!" He stands up threateningly, and something in your head goes _click _when you see a ring around the base of his cock.

Before you think too hard and are betrayed by your own brain, you dive for your gym shorts and grab your own cock ring. "You are now my permanent **** bitch!" you hiss into it. Before he or anyone else can react, you slip it on and maximize the projection distance.