You should never have invied your crazy ex-girlfriend over. She's handcuffed you naked to to the bed, leaving the keys on the shelf where you can't reach. You resort to shouting for your roommate for help. She's shocked to find you totally naked and spread eagle, teasing you a bit, and as she unlocks one of your hands she quickly realizes she can take advantage of the situation. She notices how hard you are, and even though you only have one hand free she makes you work before she unlocks the other ones...