So my wife, Patty, and I went to a family wedding this weekend and we stayed at her sisters house. We slept in her 14 year old daughters room.
On Saturday afternoon, after the wedding itself we all went back to the house to relax for a bit and to change out of our 'church clothes' into casual garb for the party that night.
My wife and I were beginning to fool around in the bedroom when we got caught the first time.
Patty had just been giving me a hand-job and was now lying on the bed with her legs spread, masturbating. I was standing off to one side watching, while stroking my penis, getting hard again.
My niece walked into the room at this point, stopped dead, and actually ran from the room looking horrified. We both just about broke down laughing.
Later that night, Patty took the poor girl aside and they had a little talk; however she never could look me in the eye for the rest of the night.
The following morning, I woke up early and horny, as I always do. I went to the bathroom and took a quick shower, hoping to be done before the rest of the house got up.
In the shower, I began to think about what had happened in the afternoon and I began to get hard again. I need to use some lube when I masturbate, so after getting out of the shower I found some hand & body lotion and masturbated. When I was going to cum, I stood in the bathtub again and shot my semen into the tub drain.
Just as soon as I had done that, the bathroom door opened and my niece came into the bathroom. She did not realize I was there and quickly turned and hung her bathrobe on a hook behind the door. Now completely naked, she turned around and saw me. I was also naked with a semi-erection that was still dripping semen.
She screamed and tried to open the door but it got caught on a towel or mat that was on the floor, after a few seconds she got the door open and ran down the hall into another room.
I managed to make it back to my wife and explain what had just happened before all hell broke loose.
Again Patty saved the day and calmed everybody down, I owe her big time.