Minor problems of a futanari - 5

Doing activities together with your futanari girlfriend can be tricky, especially when the activity is yoga and she's wearing a tight bodysuit. She does several poses, and you get turned on. At one point, you help her with a pose, and your hands brush against her breasts. She gets aroused, and for the rest of the exercises, she can't hide her erection. Finally, she moves to a corner and exposes herself. She signals to you and shows you that she already has pre-ejaculate. So, without anyone seeing you, as a sort of punishment, she sits on top of you and finishes ejaculating on your chest. Maybe you shouldn't get her that aroused in overly public places!