Are my Mom's spending habits normal and should I give her my money?

Actually, I am moved out. My Dad wont consider divorce until my brother is moved out too
Honestly, he'd have to pay out the ass in alimony because by the standards of the government she qualifies for disability. We are encouraged to show obvious gratitude for what little she does do and try to act sympathetic to her complaints but I try to avoid her because all she really does is complain and she is a dark cloud in our house. When she leaves, everyone is happy and joyful but when she is around its... depressing. She always bought me what I wanted as a kid and had me on lots of medication for adhd when I was younger. I'm normal now, I stopped taking it at soon as I turned 18 but she was always just drinking, sleeping or whatever. I just kind of lived my own life and dealt with all of the therapy and drugs pushed on me. She didn't discipline me or anything and yelled at my dad when he tried sometimes. I always had to feel sorry for her though. Over time I grew less and less sorry.