Michael exchanged a brief look of amusement with his mom at the familiar noise made by Caitlin; Anna quickly resumed her stern look as the familiar vo...ice shouted from the top of the stairs.“What the fuck were you thinking Mickey?” the high pitched voice cried.Anna sat still and turned her head towards the door as Caitlin appeared. It was incredulous that a sixteen year old girl, barely measuring five feet tall without an ounce of extra fat anywhere on her lithe frame and wearing the school. Wiping the wetness from my fingers onto my blanket, I respond to his message. “I hold the base of your cock with one hand as my wet, hot mouth slides slowly up and down your cock. With the other hand, I gently caress your balls.”I sit back on my heels and return my fingers to the wetness that we have created together. I picture myself sucking his cock as I begin pinching my nipples with one hand and sliding my fingers in and out of my pussy with the other.“My cock growing harder in your mouth,. As I ran my penis up and down on my sister's vagina, I kept an eye on her face, looking out for any signs at all that she might be waking up. There was nothing. She just kept on sleeping, completely out of it.I paused in my rubbings, letting the tip of my penis come to rest against the entrance to my sister's vagina. Now I began to really think about sticking it in her. I mean, I couldn't actually fuck her for real, but maybe if I were to stick all the way into her and then pull it right back. This is my house. My family. My birthday. This must be some kind ofalternate reality where Tony was born a girl or something.My sister poked her head back into the kitchen and asked, "Did you wantto use the shower first?" Sure," I said getting up and walking back to the bathroom, eager tokeep moving and to not dwell on my current situation. I closed thebathroom door, took a deep breath, and turned back to Christina in themirror. "What did I get myself into?" I said to her.I turned the shower's.