A high school boy's friend's sister finds out that he has sensitive nipples. Seeing this, the sister is fired up. She pinches, pulls, licks... Her nipples are thoroughly stimulated until he gets a full erection! Unable to hold back any longer, the sister pushes the boy down and fucks him raw! She pistons him to the brink in a spider cowgirl position, enjoying his sensitive reaction! She teases him to the limit and finally cums inside him!