Let the hand stay.

Mike did nothing and soon her hand begin to move on his thigh, slowly closer and closer to his crotch. Soon she was rubbing his cock. It immediately began to get hard. He looked again to the brunette but she continued to look forward. He looked around to see if anyone could see what was going on but the room was dark and they were in the back row so no one could see...except one person. He glanced over and noticed the redhead had seen and looked away when he looked over. He watched her out of the corner of his eye and realized she kept turning back to watch the brunette's hand rub his crotch.

Then the brunette took it a step further. She moved her hand up, unbuttoned his shorts, unzipped them and reached her hand inside and began stroking his cock inside his shorts. Mike was frozen; he didn't know what to do.