Family trauma depression heartbreak and every kind of disappointment

My mom married my dad in 1988.

She was a teenager, forced to drop out of school, she was about 18. It was cultural/traditional for a woman her age to get married off by her family and older sisters who were tired of her living with their families anyways.

My dad was around 24 during this period and was still in college. So every wealthy they have now they built together but still dad was more educated and the breadwinner compared to mom who didn't even attend high school.

Fast forward dad was a cheater, always cheating on mom with younger girls, older married women you name it, anyone he could get his hands on, some whom she counted as friends and even her family members, but she never left my dad because her family was very poor and we would never get the chance of school due to high education expenses. She stayed because she didn't want us (4 kids then) raised by a stepmother. He was at this point willing to let her go with us and get a younger woman or to have 2 or more wives.

He forced her to tie her tubes so she dont have more kids in addition to the abuse of cheating and mental torture she succumbed to. FF mom developed diabetes that rendered her helpless to care for herself but at this point dad is very rich to afford maids that can look after my mom while he goes about cheating and verbally abusing her.

My mom later (when we are now grown) opened up to us about everything dad put her through and it was very heartbreaking for me as a girl to learn that my dad (my hero) was abusing my mother in that way. We tried to help as kids but with time my dad would go back to his cheating habit. We then (as siblings) decided to find ways just to help our mother build herself and get help. She assured us she wanted to leave him and start off again on her own and we supported her emotionally and financially since she was gonna apply for a divorce later.

Like I previously stated dad Is a powerful rich man now who can get away with literally anything so when mom decided to tell her family and his family that she was leaving him and was gonna seek divorce, they literally persuaded her to go back to him because it would ruin his reputation, career and degrade him as a man to have his wife divorcing him.

I'm so heartbroken to write this or even talk about it because its like I'm watching my mom die slowly just to save face and I feel like there's nothing I can do to protect her anymore because by the end of the day she can walk away if she really wants to but shes taking more the pressure from her elders and her family to stay

Her diabetes has worsened to diabetic neuropathy now that her legs hands and back are constantly in pain but my dad obviously doesn't care because he would rather have her dead than leave him due to his career.

I feel helpless and I don't know how to help her. My siblings have so far given u because they have their own families to care for now but it still haunts me to the point I can't sleep sometimes my blood pressure gets high. I have confronted him before but I just think he doesn't love her anymore thats why he doesn't care about the pain hes putting her through.

I guess I just wanted to share with my anonymous friends because if I tell my real friends they wouldn't believe me because we look like a happy family or worse still judge us.

I have never really opened up about this to anyone and I feel like it affects me more than my siblings or they hide their true feelings from me. I'm the youngest of them.