I want to tell my mom enough is enough after her 4th wedding
Wow, why would you tell her that?
I felt betrayed by her, I did nothing to deserve this.
It can be difficult to tell your parents when they are doing something wrong but you should talk to her. She shouldn't be getting married so many times. People will think there is something wrong with her.
She should learn to hang in there and not bail everytime she has a disagreement with her husband.
You might be right, but who really knows what issues she's working through. You might consider talking to her. There are at least two sides to every story.