It was then that I also realised she was gently grinding her groin against the side of my hips. The T-shirt must have rucked up because I could feel h...r hot flesh against mine and the puffy slickness of her pussy as she rubbed it on me."Oh, Jack, this is wrong. You're my big brother. My older brother. And I'm your little sister. This is wrong. It's bad. It's naughty. It's i****t."Her whispers were getting husky with excitement as her hips moved against me with a rhythmic grind. Her upper thigh. I know now from Taylor that it was seven inches, she'd measured it once, and that is above average though not as enormous as I thought that day. It was big in my eyes, for sure. He stood there as she reached over and took it in her hand to give it a little squeeze. Then she pulled her hand away, took mine and put it on top of it. "Here, Gina, see what you think." It was so warm, and it did feel hard, especially the inside though the outer skin was soft. "Feel the end, right here, how soft it. My MIL then started doing a combination of swirling her tongue and taking my cock all the way down her throat, she was alternating between the two. She then licked the shaft all the way to the base and my balls and started sucking on my nuts while stroking my cock with her hand. She licked backup the shaft and took my mushroom head back in her mouth and ran her tongue around it while she stroked the lower part with her hand. I was getting close to cumming so she backed off. She then started the. He had never heard her use a word like "relationship" to describe them. Now he wasn't sure how to react, or if he should react at all.Jason looked at Melinda's face. Was she blushing? It was hard to tell in the subdued lighting."Anyway, " Melinda said, flustered. "Yeah, we're both wallflowers. Deal."Jason's stomach churned, as if he were about to give a speech before the whole school. "Um ... all right, maybe I can--"Melinda grabbed his arm and hauled him into the throng."Wait, Melinda, what.