I fuck my girlfriend\'s twin sister unintentionally, but I enjoy it much more.

They had been together for exactly two months, their relationship had advanced quickly but that had not prevented them from feeling a strange way of loving. That weekend they had gone on a trip, but he was surprised to arrive at the cabin and find not one, but two identical girls. He had discovered that his girlfriend had a twin sister. At nightfall he didn't think about it and entered the room that both sisters shared, determined to fuck his girlfriend. Upon entering he found two half-naked girls on the bed, without thinking he began to touch the first one that was close to him.