Rude Awakenings

You're over at your girlfriend's flat, but she's gone to work so you're just hanging around. Her flatmate is on the kitchen floor-sweeping, and you have a lovely view down her silky nightie. It's making your cock quite hard, and it doesn't take long for Roxee to spot your erection through your pants. She asks if it bothers you that you're wanting to stroke your cock over your girlfriends' hot flatmate. You tell her you don't mind... neither does she by the looks of it...