My sister was 14 years older than me and always wanted me at her house. Her husband drank a lot but treated her ok for a number of years. he worked very early and after work he started drinking at the ends of the day. I know she told him drinking was killing his hard ons, had no idea I could hear them. The heat registers connected the rooms. I guess she set the alarm early and got her some in the mornings. The alarm woke them and woke me as well. I rode with her to drop him off and pick him up.
By this time I was at or near 12 years of age; curious kid especially about sex. lot of things at their house did not work including their bedroom door. Would hang about half closed all the time.
the alarm sounds, he goes to the bathroom and farts on the way back. The bed starts making sounds and I need to see what's happening.
She is on him and no covers and no clothes. she could work her ass so fast and so smooth in the motion. he came first usually and she rode the left over half limp meat and got hers after.
When I knew I could stand in the hall and watch I got up and watched. Seen her suck him off and him between her legs. her legs bent and her hands on the side of his face guiding. The out side night light lit up their room and made a nice view.
Watcher her get on him, he never mounted her ever. I was proud of her sex abilities. in years to come It bothered me that I watched.