You and your sister arrive at your hotel on vacation, to discover that there is only a single bed in the room. Your sister swears she did book a twin room, and that this is not her mistake. The bed is small, hot, and uncomfortable, and you and your sister become very irritated at each other. Yet somehow, when she turns around, you can't help beginning to grow an erection She notices, and is annoyed at first, but then her mood changes. She touches you under the covers, then encourages you to finger her. Now, you can't resist. You want more. You want to give your sister the biggest part of you: your cock *POV FUCKING IN TWO POSITIONS*