Re: Sometimes mean mother
I think she takes this behaviour out on you and not your brothers because she knows that no matter how much she pushes you, you are not going to start being detached from her. She may think your brothers will be quicker to back away. In some twisted way, it re-assures her that you are there for her when she lashes out because you still treat her well.
It's extremely difficult to ask a parent to exercise self-control and restraint, and your mother will be less likely to remember control herself in heat of the moment.
However, I want you to tell your mother to calm down next time she flares up. It may shock her into checking herself and the realising effect it is having on you.
You said you are soon to be married, you may find that your relationship with your mother improves after your marriage because you won't be living with her all the time.