In front of the chair where I was to sit were two A4 pieces of paper. One was an introduction and job description, the other was a short test with a ...ew questions of which I had to answer yes or no. I kept thinking of one of the last emails he sent; it had three questions, one of which was How Submissive are You? I heard a million voices in my head screaming it at me over and over and I couldn’t take my eyes off the book.My hands were trembling as I picked up the first sheet and read through. I know that most siblings, especially brothers and sisters dont get along very well, fight all the time, annoy each other or one gets on the other ones nerves, but for us it was just the opposite. We were best friends, even with the two year age difference between us. So I just asked: Can I come in? -Amm, OK I stepped in and he was in his bed, under the covers. I just came closer and sat on the edge next to him. I placed one hand on his forehead and he felt fine. You dont have a fever, is it a. I was afraid to blow my wad, losing the turn on and then being ravaged by quilt or jealousy. So I forced myself to stay right on the edge as I watched my wife and her brother fuck."Oh fuck. Oh fuck. Oh fuck. I'm cumming again," Linda hissed as she tossed her head from side to side. "Oh fuck yes s*s," Mike grunted. "Your pussy is so fucking tight. Cum for me. I'm gonna fucking cum." Mike growled as he started to really slam into her deep and hard."Oh fuck. Cum! But don’t cum in me. From the look. I shuddered as I pumped into her my ejaculation was so strong I pumped more sperm into her than I ever thought was possible. My legs where shaking so much as I spasmed. I was still trembling as withdrew from her hole my cock was followed by some of my cum dripping down from her boypussy down her balls and onto her cage . I started to finger her hole when I heard the door open behind me .It was Maddies father .Staring in disbelief at the seen in front of him . His only son dressed like a little.