Brazen seduction

My flatmate Beathe's boyfriend is waiting in the kitchen while she's at the doctor. I've had my eye on him for a while and so I take the initiative to seduce him really brazenly. I tell him a lie to get him to go along with me. I wonder if he'll go for it and believe my lie. You'll see in a moment. I slowly open my shirt, under which I'm completely nude. How would you have reacted?