I took off my clothes and I asked if the sister could help me climb the chair, she did so only too well,I sat down, the sister put my legs in the brac...s apart, my labia spread out and the sisterput a cloth under my ass. She said that the doctor was gone and that she was going to investigate something. I said: OkayThe sister was a beautiful young woman with a beautiful figure who made her very sexy in that tight sister suit, and she was very friendly.She put on gloves and put lubricant on her. If I can I’ll describe what I see in her, she’s a brunette, stands maybe 5’6” or so, maybe 140 lbs and I believe most of that are tits.Her tits, awe, I could look at those monsters all day and when she and dad are wrestling they bounce all over the place and jiggle as she’s laughing at one of his jokes or being tickled as they love to do to one another.As we started living together it was obvious that I needed to see her tits bare at all cost? I found one of her bras in the laundry basket,. Then he quickly slapped me across the face, and grabbed my wrist and put it back on his dick. He then lifted my shirt off of me, and pulled me down to the floor where I knelt down in front of him. As he looked down at me, he spoke in his deep voice, "You know what I want you to do with it Brianna. Go on and put it in your mouth baby."I couldn't believe the way he was dominating me, but little did I know this was just the start. Without hesitation I wrapped my lips around his throbbing black. Balancing my weight on my hands above his shoulders I found that I could control how the head of his cock rubbed against my clit as well as the speed of the up and down motion. Nat moved his hand so it rested between his cock and his belly. He started arching his back matching the fit of his hips to mine so when I moved over the head, it barely penetrated my folds. ‘Oooooooooooooo!!!’ I hummed out loud. Hands enclosed my face, tipping it up and pulling it down to his mouth. ‘Kiss me baby,’ he.