My 19 year old brother used to smack Mom on her ass

I was 18 my brother was 19
When my brother was upset he would smack our Muslim mom on her bare ass
Even in front of Dad he would lift her dress and smack her ass
Some times he would lift her dress and smack her on the pussy
He would also smack her on the face
One time in front of Dad he spread moms pussy lips right in front of dad's face
Mom never resisted
I guess she got used to it
My brother did this to shame Dad one time he fingered Mom's pussy in front of Dad
The worst was when he put Mom on her knees in the kitchen and jerked off into her face
When he was ready to cum he made Mom stick out her tongue it got worse after dad died
My brother would go into Mom's room at night
I would hear the bed squeaking
One morning I went into Mom's room to ask her to make breakfast
My brother was on top of Mom fucking her
Mom was putting up a fight but she was not strong enough
So she spread her legs wide apart and took the thrusts of his cock
Mom said to him "if we are going to do this we should at least kiss '
They started kissing
This went on every night