Tracy warms up with some cardio

"I think we'll start you off with some cardio slut, seeing as you were barely able to keep up during the gangbang. This way you'll be able to actively pleasure more cocks for longer periods of time. But before we get you started, we better get you changed into a proper outfit for your workout."

You've left a pair of Tracy's yoga pants folded on the floor on the side of the room. Tracy heads over to them and holds them up before putting them on to find that they're the pair from the day of her gangbang, which she had worn during the shopping trip. On that day you had completely torn open the pants so that her pussy and asshole were exposed and then further torn open in the evening to completely expose her juicy ass cheeks. Of course they had also been used to mop up some squirt juice in a lingerie store, but Tracy had washed them since. Tracy changes into her new apparel before coming over to meet you at the exercise bike.

"So I'd imagine you can guess what you'll be doing here. It's pretty simple, you just have to ride the bike, but rather than sitting in a seat you'll be bouncing up and down on this dildo as you pedal."

"I see. And which hole should I put the dildo in sir?"

"Why don't we go for 10 minutes in each, so we can warm them both up, starting with your pussy."

"Yes sir."

Tracy climbs atop the exercise bike standing on her tippy toes on the pedals. Once in position, she slowly lowers herself onto the dildo so that it's now just penetrating her pussy. With the dildo well lined up with her pussy, you turn the screen on and she starts pedalling. Her pedaling is slow at first as she gets accustomed to the feeling of sliding up and down a dildo as she pedals. However, she slowly gets used to it and eventually is riding the bike just as fast as she would a normal bike. As she pedals she bounces her body up and down so that the dildo beneath her is pistoning up and down into her pussy. Her tits are now violently bouncing up and down with this motion and even flicking some of your cum off her chest and around the room, which you're sure Tracy will be disappointed about. As the exercise goes on Tracy's pussy starts getting wetter and wetter and leaks her cunt juice all down the dildo, making it nice and slick as it pumps in and out of her cunt.

After ten minutes of riding the bike, Tracy slows down and stands as tall as she can on the pedals, lifting her pussy up off the dildo. You decide to help her out with this next part and grab her ass cheeks to line her rear hole up with the dildo. Thankfully, her pussy juices have lubricated the dildo well so it isn't too difficult to slide into her tight ass. Tracy slowly starts pedalling on the bike, sliding up and down on the dildo repeatedly. You can tell this makes the workout slightly harder as she puts on an expression of focus and determination in order to handle the physical intensity of the workout as well as the immense pain in her backside (this was no small dildo). After enough time, Tracy starts panting due to the physical strain of the workout and you can start seeing beads of sweat developing on her mostly exposed body. You give her a good spank on the ass as encouragement, letting her know to keep up the good work. This slightly throws her off her stride as she lets out a squeal and jumps forward from the **** of your spanking, popping the dildo out of her ass. You go to help her reinsert the dildo but she simply slows down her stride and takes one hand off the handles, realigning the dildo into her ass all on her own.

She finally finishes her 20 minutes on the bike, but before finishing asks "may I stop now sir?" Feeling she's spent enough time on this particular workout, you allow her to jump off the bike. You notice her ass is slightly gaping now from the constant pumping of the dildo over the past 10 minutes and watch as a bead of sweat slides down between her cheeks and into the open hole.