I nodded and stood up and took my gown off and in the process, I took my bikini panties off too. He looked up at me in surprise and said, "Really? You will let me see yours?" So I got brave again and said, "Would you like to see mine?" He said, "No, but I have always wanted to." So I asked him, "Have you ever seen a female's titties before?" He started stroking his cock again and I was getting aroused so much that my pussy was soaked. So he walked over to my bed and laid down with his head on the foot of the bed. I told him, "If we are quiet then no one will hear us so come on over." So I said, "I am having trouble seeing you, so why don't you come over here and lay down and jack off." Wonder if I could get him to come over to my bed where the flare ,at the refinery our Dad was foreman at, was shining in the bedroom on my side of the room. I was mesmerized watching him even though I really could not see him very well. So he took the covers off and started stroking his cock. I told him, "If no one can hear you then it will be ok."
He said, "I don't think that is a good idea." I told him, "You were jacking off weren't you? And I will not tell Daddy if you show me what you were doing as you jack off." He said, "You said you knew what I was doing so you tell me." I said, "Then tell me what you were doing then and I won't say anything." That scared him so much that he said, "Please, don't tell Daddy." I told him, "I know what you were doing and if you don't tell me then I am going to tell Daddy." It scared him so much that he covered himself up with his covers. So I cleared my throat loud enough for him to hear, "Ahemmm Ahemmm," I noticed a movement and thought to myself, 'OH WOW! He is jacking off!' I could barely make out the other side of the bedroom in the dark where my brother was sleeping on the other twin bed or I thought he was sleeping. I was asleep one night and a noise woke me up and I looked around to see what the noise was.
So he is rather skinny in High School plus he played football. My brother is 18 years old, 5'7", and weighing 140 lbs. I am 23 years old, 5'2", weighing 120 lbs, 34C tits, 34 hips and 24 inch waist. My brother and I are 5 years apart, with me being the big sister.