I took its head into my mouth and massaged it with my tongue, not hesitating long before I went for the sulcus (that lovely groove on the lower side o...f the penis). The creature grunted, proving to my delight that humans and monsters clearly were, in fact, a lot alike. I massaged the huge boner for a few moments but when I released it from my mouth it slid on and into the waiting pussy. The girl screamed her passionate screams again as the enormous shaft went inside her. I couldnt hold on. My sister's legs were slim with just a hint of a nice shape, while her middle was flat and taut. Her bust was her best bit as far as I was concerned, they may only be a B cup, for that's what I had found written inside one of her bras, but they were high and proud even while lying down."I want to go to sleep," she slurred, trying to reach behind herself to undo her bra clip."Let me," I said and with some difficulty I managed to unclip it and pull it off down her arms.Oh my, I thought for this. I knew this was my only chance. Although I was a virgin, I had a lot of experience watching thousands of porn movies! I remembered one particular porn movie about giving oral sex to woman. The man in the movie taught a very simple technique. He said to lick the woman’s clitoris by drawing the alphabets with your tongue on her clitoris.So, I started writing alphabets on my mom’s pussy with my tongue!By the time I was at letter “O”, mom was moaning loudly. Mom had an orgasm by the letter “X”! She. I reached down and gently massaged her tits and pinched her nipples. “Oh God does that feels good. Don’t stop. Pinch a little harder. I like to know they are being played with,” she said in between. I obliged and got more moans in response. She was bobbing up and down and taking me all the way down her throat. I thought I was going to come and tried to pull out. I wasn’t surprised to see her spare hand playing fast and hard on her clit. “Nooooooo in my mouth – give me you in my mouth….. now …..