I smiled as I took my t-shirt off and then my jeans. I could see Gary looking at the obvious bulge in my boxers and he said come on take them off. I t...ld him that I would like him to take them off. He looked at me and said with pleasure. He slowly pulled them down to reveal my very excited cock. Throwing my boxers on the sofa he asked if he could touch my cock. With pleasure I said. Being completely naked and letting another man see my erect cock is exciting enough but when he put his hand. She had been tidying the kitchen and as she'd go by me she'd brush past me a little too close, I'd see her look at my cock area. She'd lean in to tell me something and grab my forearms while giving me 'the look' while that smile would draw me in further, it made her look filthy as fuck. I of course embraced her flirts and responded with my own, there was no shying away this time. Uncle Jack returned once more, he had no idea."I'm just going to the garage, anybody want anything" at almost the. I was in the kitchen when she arrived and straight away I noticed her nipples just poking through the sheer material of her top. I am sure she noticed me staring but I just couldn’t help it. After a while I had to make my excuses and go to my room, the tent in my PJ bottoms was getting embarrassing.As I went upstairs I let my sister know Jenny was here so get ready so she stripped off and laid on her bed legs spread and she start to finger herself and pull on her nipples, I couldn’t help it but. Just to show how sexy her sister looked. I added that of course that would mean the sister needed to reciprocate with a picture of her own. Well, that was a few days ago, before my wife left town. We never did get a chance to send that photo, but her sister is texting, looking forward to seeing my handy-work, and these photos that “are not naughty, but just beautiful,“ is how I put it. Implying the photos and lovemaking afterwards is that as well, beautiful, not naughty. I guess I was.