Thereafter, I would generally spend every other weekend with him and it continued on. The next weekend I spent with him was when he showed me how to s...ck his cock correctly. He actually lay on the bed, on his back, and taught me the proper way to suck cock: How to use my hands, how to use my mouth, how to use my tongue and how to accept his cum in my mouth without gagging."My memory is that we spent a good deal of time on that next Saturday in bed, basically me practicing sucking his cock. I. "Where's Dad?" I asked. "His car's outside." I guess he had a rough day at the office. He's taking a nap right now. He'll be down later." Mom and I had good appetites for dinner but Sheila just picked at hers. I never did see Dad during dinner. Mom must have really worn him out.After dinner I walked up behind Mom and embraced her. "Thanks for your help with Sheila," I said."I can't believe I did what I did. What are your intentions with your sister?" I want to knock her up and do the same with. I then pulled my finger out and tapped on her ass cheek suggesting to move ahead a little. She understood exactly what I wanted and lifted herself up a little to moved forward on her hands and knees. I pulled my legs from under her and got on my knees behind her. She was perfectly sitting on all four in front of me. As soon as I got on my knees, I held my cock and placed it on her ass pussy with one hand on her upper thigh. I gradually pushed my cock head inside her ass. I paused there for a. "I have seen this submissive in action. She cums so wonderfully, I wanted you all to see her cum as well!" With that, he began rubbing her pussy through her pink thong panties. At first her embarrassment and the idea she was on display like this prevented her from reacting to his actions, but it wasn't long before her fear gave way to arousal as he continued massaging and petting her. She started softly moaning and spread her legs a bit wider. He smiled as she began to get into it more. Within.