Your brother's girlfriend

You freeze as you see your brother's girlfriend asleep on the bed. When he had first announced that he had a girlfriend, you were confused, but she's just as disgusting as he is; overweight, greasy, and smelling like she hasn't showered since last week.

You also know that there's no way you're going to be able to convince her to have sex with you, so you're going to have to make her...