"Won't Tell My Boyfriend"

You have a crush on your housemate, and she's currently chilling alone in her bedroom. She's wearing a robe, but it's wide open and you can see her cleavage. She isn't blind, she can feel your eyes on her and her breasts. She can see you need to get some frustration out of your system, so go on, have a wank, she won't tell anyone, promise!