"I've seen him. But look, I'm not upset about it, okay? It's not like it matters, right?" You've seen him?" I repeated, only focused on one thing Seth...had said. "When?" I'm not sure why I found the need to defend myself from the topic, rather than just find it funny.Seth was frowning at me, but, then he let out a breath and spoke reasonably. "There have been a few times that I noticed it. Like, that night I was watching you at Dave's birthday..." You were watching me?" I interrupted, feeling. I wrapped the French knickers around my erect cock and started to wank. I was taking a risk of some one coming through the kitchen door but it was unlikely and the danger added to the thrill. It didn’t take me long to cum and I shot load after load of my spunk into my auntie’s silky knickers. Very quickly I cleaned up and put the panties back in the machine and pushed them to the back just to be on the safe side. I got dressed and went back to watch the TV. I did feel a little guilty as I. In spite of the spring mattress making loud noises, I was able to hear his balls banging against my pussy lips, as he kept fucking me hard.And there it was. I pulled him closer wrapping my legs tighter, trembling gasping shivering all over the body. I was cumming with loud moans. Unable to do anything else, I pulled him and started biting his nipples. He slowed down his strokes now.He was giving long slow but powerful strokes and then went rhythmically. He looked into my eyes watching me melt. It didn't take long for her first orgasm to pop off. She must have been really horny."Do you like this?" I growled in a low voice as I continued to work my cock in and out of her pussy."Yes!" Bethany exclaimed at the top of her lungs. "Oh god, I love it!" Then you're going to behave for me from now on," I told her firmly, slamming my groin hard against her clit. It earned me another gasp and a groan from my sister-in-law, "or you're going to go without. Do you understand me?" Oh yes!" Bethany.