A mostly regular workout

You enter the main room of the gym and see a couple of buff dudes lifting barbells and another girl running on the treadmill.

Amber makes you start warming up on the treadmill and after that puts you through a round of leg exercises and you are pretty sure you know when she noticed your modification to the pants: she was checking your form in the leg press movement and as you crunched your legs your pussy hole was clearly visible to her, she stammered for a second but then finished her explanation.

After that you feel like the following focus on stretching and glutes exercises wasn't totally dictated by her professional expertise. At some point she made you stand with your legs spread apart and then bend to touch the ground.

"This exercises is great to stretch your hamstrings, if you can hold this position for one minute"

In that minute she surely got a good view of your sweaty pussy as did one of the two dudes, you were more interested in Amber but seeing the huge boner he got did make you even hornier.

"Do you want to move to the personal training room, so that you have a bit more space to do the last round of stretching?"

"Perfect"

You got in an empty room with some yoga equipment and she closed the door behind you.