I knew what was about to happen but could not stop it, 'be carefull, It hurts' I pleaded, if you pull back to much, softly she whispered It will be ok... she released the presure,I winced as she let the pressure off, I could feel the foreskin slip foreward to recover the head. the stinging stopped. ever so slowly she moved up and down on me, I could feel every nerve in my penis tingling. I so wanted her to stretch it again , to feel that sensation again, She slid off me and now she gently cupped. After a while, I noticed I was paying more attention to her than my game. I was unaware of my surroundings. My parents were asleep just down the hallway, and her boyfriend was nowhere to be found, so I had a feeling she was staying the night (score one for me). I guess she was awake for a while, because she started to shift, and hit me with a "Can I help you?" I simply replied, "Sorry sis, I just forgot how beautiful you are." She blushed and started to drift back to sleep, apparently not. I said "what" he said you want a blowjob and I don't mind giving you one. I hesitated for a second then pulled down my pants exposing my rock hard 6" cock. Mark took it in his mouth and started sucking it felt amazing he licked the head each time he went up and down. He could take it all the way to my balls without gagging making me almost cum each time. I was moaning within 30 seconds I telling him how good he was and he come up for a breathe and said just remember to repay the favor. Grandma went out back for a cigarette while I helped mom with the dishes.I spoke to gramma about what happened last nite and she agrees,we will help with your sexual education and desires.Starting now things will be more relaxed around here.The doors to the bedrooms will never be closed,The bathroom door will remain open at all times,except when we have guests of course.None of what goes on here can ever be told to anyone,and clothing will be worn minimally.Do you agree with these things Donny?.