Shower?

As Zach entered the bedroom to grab his things, he saw Hannah sitting on the bed. She was wearing a dark blue tanktop and a pair of leggings. She stood up as Zach walked into the room. "Hey Zach, can you help me stretch out before I go exercise?" She said with a slight grin.
Zach was dumbfounded, not only did he get to room with this bombshell, she is now asking him to help her stretch and such. "Sure thing! Whats first?"
She walked over to him and turned around. "Ok im going to reach my arm around and I want you to pull it back, ok?" She said. "Sure!" Zach grinned as she reached her arm across her chest. He grabbed her hand and pulled slightly, stretching her arm. Then she did the other arm, same routine. But after that arm she bent over and touched her toes.
Her ass, perfection, right before him, just inches away from his groin. What will he do?