Unexpected change

The next morning Nick awoke in Megan's body. He decided it would be good to take a shower before changing back. He loved how smooth and slick her skin felt when it was wet, he found his breasts and teased his nipple the feeling was astounding. Then he began to clean her lower regions and felt a jolt of pleasure.
"Oh my god!" He heard Megan's voice moan from his mouth. He looked at the door to make sure it was locked and gently ran his hand down from his waist and slid his finger gently in. The pleasure washed over him.
"This is fantastic." He said to himself and began to masturbate fully.
The pleasure overcame him he started to get loud, Megan's voice echoing through the apartment.
A few minutes later Megan's body emerged from the bathroom and saw lying on her bed the Medallion and a fresh set of his, Nick's, clothes.
Ross smiled from the doorway.
"Sounds like you were having fun. Sure you don't want to have sex before you change back." Ross said smiling.
"You know after what I just went through if I was in here a little longer I might take you up on that. That's why I'm changing back now.", Nick said firmly.
"That's why I laid stuff out for you I have to see this change. This should be cool."
"If you like." Nick walked over and picked up the amulet and the shirt. The changes started immediately.
Only they were not the changes he had expected he felt himself getting firmer and his breasts growing his hair grew a little longer and straighter and he got about 2 inches taller. When the changes had completed he looked at Ross with anger.
"It worked. Did anyone ever tell you that you're sexy when you're angry?" Ross was laughing so hard his sides hurt.
"What the fuck did you do?" Nick screamed in her new voice.
"Last night after you went to bed I read the nite that came with the Medallion. I wondered if I could convince you to stay a girl a little while longer. I went out to a college bar where they were having a wet T-shirt contest and found the hottest chick who entered the contest and offerred her that T-shirt to wear in the contest. Afterwards I got the T-shirt back, dried it and ironed it and laid it out for you. By the way, you'll love this, she's a recovering sexaholic.
"You think it's so great you should be a girl for a while too." She charged him with the shirt and the medallion and pressed them to his forehead. And....