Carla gasped " nev... er... sooo... deep... be... fore... oh... oh... James... that's... it... that's how... it... oh... Christ... oh... Jaaaaames... ...o... so... goooooood! You... are... the... the... best... oh... fuck... meeeee!" I redoubled my efforts, Carla had finally lost control enough to say the "F" word. I fucked her for all I was worth, my 10 inches pummeling her spasming pussy. I stroked faster as she came to me again. "I... I... I'm... cuuummmmiiiiinng, oh... Jesus... I'm.... I decided to take the middle road, making sure my erection was flat against me, innocently, pointing up, where it would nestle between your legs. Hey, grandpas don’t always have full control of their facilities. If worse came to worse I would plead insanity, Alzheimer’s, something. My biggest fear was that you would be afraid to sit on my lap again. You returned with a glass of iced tea, and reached over me to set it on the end table beside the chair. With the window behind you, the sun. He watched for several minutes as his heart pounded heavily while he slowly stroked his thick eight inch shaft. His cock felt harder and thicker than it had ever felt in his life as he watched this young beauty pleasure herself right before his eyes. His head felt light as the blood rushed to the huge purple cock head of his extremely excited body. He was beginning to lose control. His little sister's sexy mouth was open slightly, eyes closed and head to one side as her left hand caressed her. “Do you wanna do it in my room?’ Tina asked. Her voice had that note in it that she got when she wanted to be helpful. I felt really strange asking this, but I said, “You’ve got some hand cream, haven’t you?” She gave me a mischievous smile, and nodded. Her pussy was warm and moist, and after she let go of my hand, I took it away, a little reluctantly. Tina kissed me once more on the mouth, and stood up. Her pussy was like a magnet to my eyes, and I couldn’t help looking at her there..