Since my mom and dad were divorced, we lived with my mom. My dad would come around occasionally to visit or to pick us up and take us out somewhere for ice-cream or something else. As we got older their relationship became less and less civil so my dad would not come around very often.
When I was 18 and in high school the summer before my senior year, my older sister was 20 and she kind of looked after me and my two younger brothers when our mom was at work. My older brother (28) at the time was still living at home too but my sis was in community college and working part time so she was home more.
I was working out for football with my buddies during the day that summer and my two younger brothers were going to a day camp at the local playground run by the YMCA. I didn’t have my own car so I would get rides from my buds to and from practice and when we went out carousing. My sister did have a little compact car that she used to get to and from school and work. My mom car pooled to work with a neighbor.
One day during the summer we were supposed to have workouts at the weight room and then go to the track for running. Well, the building the weight room was in was closed for maintenance when we got there so we could not lift. We went ahead and did our running workout and then decided to head home.
My buddy lived past our house so he would usually drop me off in front on his way home. That day, as we went down my street, I noticed that my dad’s work truck was parked on a side street about half a block away from my house. My sister was supposed to be at work at her part time job that day as she didn’t have classes. I was hoping to have the afternoon to myself, so I could get some porn from my brothers room and spend an hour or two reading porn stories and jerking off. However, when we pulled up to my house I noticed my sister’s car parked in our driveway. Damn, I was hoping to be alone!
Well, when I got to the front door in was slightly open and the glass/screen storm door was shut. I was thinking to myself it was strange that my sister was not at work, she needed the money. I was also suspicious that my dad might be in the house because I was sure that was his truck parked a block away. So I slowly opened the screen door to keep it from creaking and giving anyone the notion that someone entered. My sister didn’t think I was due back for another two hours and she had to pick up my little brothers later that afternoon.
My sister had a bedroom on the first floor and because our old house had settled quite a bit, the door to her room did not shut the whole way because the frame was off. It was how I spied on her when she was changing or coming out of the shower. As I entered the living room I could hear some muffled voices and what sounded like moaning, it was coming from my sister’s room.
I headed down the hall towards her door and stopped for a minute. Her door left a 2 to 3 inch gap between the edge of the door and the frame from top to bottom. The angle of the view into the room led right to a large mirror she had on the wall and it reflected to her bed perfectly. I peaked in through the opening and looked at the mirror and my jaw immediately dropped at what I saw!
There was my sister totally naked, laying on top of my DAD in a 69 position!! Her head was closest to the mirror and I could see perfectly her mouth dancing up and down on my Dad’s fat cock. It wasn’t super long but it was unusually thick. I looked almost like a beer can. He had a large ball sack hanging below it that looked like it contained two tangerines.