Mark's Mom

I was pretty bored those first 3 weeks of Summer, because Mark had to go to Oklahoma and visit his real Dad. It seemed that Lori(Mark's Mom) was kind of sad as well with him being gone; so when she saw me walking up her street, she called me over. Now, if you grew up in our neighborhood-you would have known that all the other boys were jealous because I was like family to Mark and his Mom. The jealousy was because Lori was about 35 years old, 5'6, long Reddish brown curly hair, and had about 120 pounds of body that all of us (male and female) were always trying to peek at. Lori would lay out in the back yard in a bikini on her lawn chair and she would drive us crazy with her tits trying to spill out and when she would roll over on her stomach-her ass was perfect in every way! So, she had called me over to help her pull out the carpet in the upstairs hallway because it was getting replaced in the next few days. If she had only known how many times me and her own son stroked our cocks to her out the back window! The first time we saw each others hard-on's was because Mark couldn't take it anymore as Lori adjusted her big hanging tits under her bikini top! I had about half of the carpet and padding ripped away from the wall when Lori came up the stairs, bouncing and jiggling that luscious body. She was talking to me-but I was off in space looking at her huge hard nipples trying to poke thru the flimsy bathing suit! She handed me a Coke and went back downstairs. As I watched her walking down, I didn't realize that she was watching me watch her in the Mirror at the bottom of the stairs. I heard her go out the back door and turn the radio on...time to lay out! My dick was as hard as it had ever been I think at that moment! I watched out the window as she rubbed some tan lotion on her incredible breasts, taking special care to run her hand underneath and go over her erect nipples. Then she did something I hadn't seen before. She untied her top and set it to the side! She had never done that when I was around! I couldn't help it-I started stroking my dick with a fury!! Then, I heard her call my name! I told her I would be right there, she insisted that I hurry because there was a Bee buzzing around, and she was deathly allergic. As I ran out the door she made a feeble attempt to cover part of her massive rack, and looked at me over her sunglasses with a smile. She told me that she knew I was watching her from the window. I tried to deny it-but my hard dick was sticking straight out against my swim trunks. She said it was ok, and that she was glad that her "old body" could still bring a rise to her son's friends. I babbled something and went back upstairs red with embarrassment. I went right up to the bathroom in Mark's room and rubbed one out. I finished about 20 minutes later when I heard Lori tell me that was welcome to stay for dinner if I wanted.
About halfway thru my hamburger, she asked me if I liked what I saw earlier, and as dumb as it may have been to say-I said yes. This was when she got up and locked the front door and opened her robe to reveal her nakedness. Her big 38EE tits hung low-but not saggy-still full of life, and her Areolas were bigger than pepperoni with rock hard brown nipples that she was caressing for me. I was instantly hard! That night I ended up staying the night there, and for the next few days, and many times after Mark came home-I was fucking his mom...it was our secret. Just like it was a secret that me and her son were constantly putting our dicks in each other.