She calls him in

Dr. Vierre made an appointment with Nathan at once, and two days later, he came in.

She waited until he sat down, and said "Nathan, I've noticed that you haven't been masturbating." He blushed.

"Well, yeah. You've been watching us. It'd be weird to jack off knowing that."

"I need you to become more comfortable about it."

"Yeah? And just how do you expect to make me okay with something as wild as that?" he looked at her like she was crazy for even wanting to try.

"Oh... I have a plan." she smiled.