I unzipped my pants and pulled out my 9" hard cock and she was in shock. She just stared at it until finally, she did the last thing I expected. She g...t down on her knees and engulfed my entire cock with her mouth, fitting in as much as she could. I just looked down at my own little sister sucking her brothers cock like a whore and staring up into my eyes while doing it. I was in heaven. I then grabbed her by her cute pigtails and began fucking her face, deepthroating her until she started. “Okay, then. Mom, your turn. Truth or Dare?” Sarah now asked my wife.“Dare! I’m more than ready right now!” Tricia answered our youngest daughter.My wife licked her lips at the prospect of more sex.“I dare you to do a sex tape with Fanny and post it online, though with both of your faces and identities concealed, so that the world can watch you commit lesbian incest. Think of the views that it would get, two sexy Aussies, a mom-daughter duo, no less, getting it on together in real life!” Sarah. The doctor smiled at me and then grabbed one of the rods, the skinniest one on the tray."Ok, from what I read, it is very important for you to remain still while the sounds are inside your urethra so we don't cause any damage, do you understand?" I nodded my head "yes." "Good, then let's begin," she said rather excitedly.She slowly moved the rod towards the tip of my penis. We both watched, a bit wide eyed in anticipation. She put the tip of the steel to the tip of my cock and gently pushed. A smile crept to her face. Her hand graced my wrist as her fingers danced their way up my arm. I squirmed a little at the slight touch of her fingertips. "Are you ticklish?" she asked. Her green eyes met mine. "Yes, very ticklish." She took my words as an invitation. Her fingers found my ribs and she tickled me there, making me squirm and laugh and beg her to stop. Eventually, she did, so I asked her the same question. "Are you ticklish?" She looked away, then. "No," she said. But I knew it was.