Used!! Porn for his buddies !!

In the morning my roommate from the new flat shared with me that he would come to me later in the day. He wants to make a movie and I should do everything he says without saying anything! So that his buddies see how he can fuck his new little roommate and that she does everything with no comment! Oh man what should I do? I don't want to disappoint him, so I'm just going to do everything. He must never find out that it makes me horny, who knows what he will do to me then !!