They're family and they still have sex.
My brother and I went on vacation for a few days, and when we arrived at the hotel, there was only one room available with a single bed. Actually, my brother was supposed to sleep on the couch, but he's a real jerk and said I should sleep on the couch. So we both ended up sleeping in our bed, and I don't know what happened during the night, but I started seeing my brother differently. He was very sexy without his shirt, and I wanted to touch him. Then he did the same to me, and things got a little out of hand. My pussy was wet and throbbing, so I realized I was aroused and wanted to feel my brother's cock inside me. He spread my legs to touch my vagina with his hand and then penetrated me with his fingers. It was very exciting to sleep with my brother, because you feel a lot of adrenaline in forbidden things.