This took place during my late teen years in the '60s and it was my introduction to the best years of my life. I will start by introducing the parties involved. I am Tom the younger brother by 4 years to Sarah, whose best friend at the time was Gaye, both of which had been out of high school for 4 years and I at 18 had just graduated from high school.
At 18 I could get a hard on just by a female walking by, it didn't matter where I was. With the hormones raging I was jerking off at least 3 times a day. I had no experience in sex except for jerking my dick and knowing that a female could be my relief and that leads to what transpired over the next 4-5 years on a regular basis and occasionally in later life.
Although Sarah was in her early 20's and was working as a telephone operator, she lived at home with my mother and I, as my father had passed away a few years earlier. The house we lived in was unique as it was a remodeled duplex and had two staircases that lead to the upstairs. Our mother's bedroom was on one side of the house and Sarah's and mine were on the opposite side. That gave my mother privacy and made things very interesting for my sister and I. Our bedrooms were on the same side of the hall separated by a bathroom that we had to share and had doors from each bedroom which allowed us to see each other in various stages of dress.
I would get a boner when I saw Sarah in her bra and panties, which was often and I would relieve myself by jacking off, which was also very often. I have to admit being a bratty brother I would sneak into her room via the bathroom and borrow a pair of panties to jack off in and one day while looking through her drawers I found her toy and that told me where the buzzing sound came from late at night.
One day I was talking to a friend, whose hormones were also raging and he was talking about Sarah and how much he wanted to fuck her and asked me if I could hook him up with her and I just ignored him but, it gave me a raging hard on thinking about her. Later that day I went home to my room, made sure both doors to the bathroom were open, knowing Sarah would soon be home from her job.
I was jerking my cock when she walked up the hall and as she walked by the door she saw my hand around my cock and jerking it and it stunned her...."what in hell are you doing?" and slammed the door. That just made my jerking go faster and I shot my biggest load ever. Later, at dinner she was real quiet and I could tell she was ignoring me. Our job after dinner is to wash the dishes and as we were doing that, she finally said something..."that was revolting jerking off so I could see it." I said, "you don't have a clue how many times I have jerked off, hoping you would see me." She said nothing to that comment and moved on until later.