Your stepsister Kaia wants you to start working out with her so you could get a amazing hot body too. She even might have a crush on you if you had nicer body. You want little more motivation to get going so she promises to get naked for you if you do some abs. So simple! Soon she is naked and somehow you get naked too, this could be a nude workout session I guess. In the end one thing is guaranteed, your dick got the best workout of your life!