The 4 are on a elevator heading to their room, Rebecca is distracted texting her boyfriend, Kate is distracted with her, Martin stays behind Sarah on the elevator, he watches Sarah from behind with dark long curly hair. Her white shirt with two buttons opened, revealing her large bosom and her tight black pants hugging her hips, they are so tight that from where Martin was standing you could notice her panty line from it.
Dr. Moriarty looked as the boy already was trying to hold his hard on, but the good doctor decided to give him some help, he stopped the elevator quickly, making Kate fall onto Rebecca and Sarah fall backwards on to Martin. Her huge ass coming in contact his erect penis from his pants, then Martin brought instinctively both hands to Sarah's big breasts, making him blush as Sarah looked at him, "I'm sorry Sarah" said Martin, "It's okay you broke my fall, I should thank you" said Sarah winking at him.
When they arrive at the room their room is divided in three, one for Rebecca and Kate, one for Martin and one for Sarah.
As they were unpacking Martin tried to talk to Sarah about what happaned in the elevator "Sarah, look I'm sorry for earlier, okay, I didn't mean to" said Martin.
"I told its okay Martin, I'm fine" she says, she then sits on her bed, Martin sitting next to her, she looks down and sees his hard on again "Look that's okay you're a nice man, I've known you since you were little and you and Becca are good friends". She then puts her hand onto Martin's hand, "here let me help you" said Sarah.
She brought Martin's hands onto her G-cup boobs, and he squeezes. "Like them" she says, noticing Martin's hard on getting bigger.
Dr. Moriarty liked the idea of these two touching each other, but first he knew he must change them.
He quickly brought the four of them into the lab.