My Sister Is My Girlfriend!? Sexual Relationship for Two Nights and Three Days

Back in the hotel room, Shmoop wonders if his sister is his girlfriend. He sees a picture of his sister and her ex-boyfriend, and he wonders if she is too friend to forgive him. He also sees that she is wearing a bathing suit, which reminds him of the last time they went on a vacation, when they were a "fake couple" . They are all alone now, and they all want to go swimming. They decide to take a swim, but they are too slow to do so, so they sneak into the room and squeeze the bathing suit into their pants