Das physikalische Problem

Corinne and Tiffany are trying to solve a Physics problem for their assignment which is due in tomorrow. They can't get the answer so decide to ring Belle to see if she knows. During the conversation Belle tells them about the experience her and Myla had with Simon when his towel "slipped off" and they ended up getting him to masturbate in front of them. Corrine and TIffany find this too funny and decide to get Simon round under the false pretenses of helping them with their Physics. Once he turns up they tell him they are going to tell every girl at college about him wanking in front of their friends . . unless he shows them as well. They strip him naked and get him to siton the sofa inbetween them. Then they take it in turns to wank his cock before getting him to finish himself off all over the floor in front of them.