I was working on a report in my study when I noticed the light come on in the house opposite. A group of girls, studying at the local uni lived there ... I'd spoken to them a few times and as I was a friend of their landlord's I would sometimes pop in if there were any odd jobs that needed doing. I saw one of the girls, Carrie-Anne, go into her bedroom. She was giggling, then turned round and started sexily taking off her blouse. A guy (her boyfriend?), already half undressed, came into sight. But that night, Dad was away on a fishing trip with one of his friends and would not be home for another day. I still had to pee so I went and did that. When I was finished, I could still hear the sounds so I walked down the hall and pushed the bedroom door open just enough so that I could peek in and see Mom and Dads bed in the reflection in their dresser mirror. What I saw shocked me at first and then excited me. Mom was on top of the bed, naked on her hands and knees. There were also two men. Her brown nipples were hard as rocks, and her areolas were the same amazing shade, and swollen with lust. Our breasts squeezed into each other, my creamy ones smashing against her gorgeous brown globes. My hand that held her hair released it, and as I continued to suck and lick her neck, slid down her back to her perfect round ass, and up underneath her skirt, where I began caressing her pussy through her tiny thong.Just then, she bit her lip to avoid screaming as she came, although a slight. .FUCK!!! I knew I had to see more. Mom's bedroom had a master bath, my room was down the hall with my bathroom right across from my door.A few days later I came home from practice early and found a note "I'm at the pool".I started to undress and a few minutes later heard the front door opening, it was Mom and Lois one of our neighbors giggling. Mom called out and poked her head into my room to make sure I wasn't home yet. I was totally naked and had stepped into my closet.She closed my door.