I woke up on Christmas Eve night in 1986 and as I approached the kitchen, where I was going for a glass of water, I heard noises from our den.
I was 10 years old.
I walked towards the den and heard the noises more clearly and I approached slowly and quietly.
When I looked into the den I saw my Mom, completely naked, on all fours being fucked doggie-style by our neighbor Frank. He was a truck driver. he was married with 2 daughters.
My Mom was 36 at the time. She was a slim, attractive brunette and my Dad was a police officer. I had two younger brothers.
Frank was holding my Mom's waist and she had her head turned towards him and was egging him on.
I clearly heard my Mom say "Fuck me Frank!!!" several times with great urgency.
Both were sweating up a storm by the fireplace.
Frank had come by to put bicycles together for me and my brothers because my Dad had to work an overnight on Christmas Eve.
After several moments, Frank noticed me standing there and he smiled and winked at me, I was transfixed.

Now every time we get together for the holidays, my Mom always tells the story of Frank saving Christmas for us boys in 1986 by assembling our bikes for her.

It makes me sick.
My parents are still married. Dad's 68 and Mom's 66 now.
Frank still lives across the street. He and his wife divorced and he later remarried.
I don't know if it was a one night stand or if they continued it at all.
I want to confront her and tell her to stfu with the story every Christmas.
Should I?