No, you head back to the bathroom

You pull your hands away and think of anything other than Mark and Lucas. Your pole jerks, but soon the building orgasm subsides. You feel hornier than you ever have before. A picture in your mind of Mark riding your cock is enough to make up your mind.

You stuff your pole back in your pants as best you can, and march back down the hall. In the bathroom, you don't see either boy, but notice that the handicap stall is closed. You walk up to it slowly, but have trouble calming your breath since your heart is racing. You can see a pair of legs sitting at the toilet. You tilt your head down until you see two more feet hanging in the air.

Peeking through the crack in the partition, you see Mark has once again mounted Lucas and is riding him reverse-cowboy. Mark is completely naked and his legs are hiked up enough that you can everything from his stretched boyhole to his flat little chest and round nipples. Your cock throbs again.