Instead, I hoisted my sister Laura up by the hips and impaled her onto my rock-hard shaft. We both fell forward against the shower doors with a loud ...ang. I began to stroke in and out of my sister as her back was pressed against the glass shower doors. I hoisted one of her legs up onto my shoulder for better access as I began to thrust with all my might, picking up speed as I went along. As I thrust her moans started to drown out the rattling of the shower doors.“Oh yes…yes…yes…” She began. She bounced on the bed and clutched at herself, her bottom raising right off the pillow and then collapsed out of breath. I slowly removed my fingers and came up to give her a kiss.“Oh my God.” She said. “That was a first.”“What?”“That butt thing. Wow."“You mean you have been walking around with the beautiful butt for all these years and no one has ever played with it?”“No, not really, I had a boyfriend once that was always trying to fuck me in the ass, but it never happened.”“You have never. The whiteness of them was so noticeable due to the brownness of her shapely legs.Being a voyeur I couldn't take my eyes of them imagining what they were covering.My cock started to stiffen so I lay on my front to hide it.At this point she turned around and I turned away as quickly as I could but definitely not quickly enough. She had certainly caught me looking at her panties.I felt bad about this so decided to avert my gaze for a while hoping that she wouldn't take fright and maybe think that. You might want to hold the chair for her as you sit down to eat, but other than that, my previous comment holds,” he said with a grin. “But all that aside, we came to get you. Let’s go have a light workout. That should get your mind off the wedding for a little while. And don’t worry; we won’t do enough to get you sore. You’ll be in fine shape come tomorrow night.”“But we’ve been living together for months. Marriage can’t be that different.”Odd, but all the men thought that was absolutely.