<human>: Give me a shortened version of the text

F23/M29  4 years together. Sorry for bad spelling, English is not my first language.

My SO's mother tried to drown herself in a lake yesterday. She was rescued and is now in hospital. My SO is shattered, and I try to be there for him and comfort him the best I can.
My problem is that I have mixed feelings for the whole situation. My SO and his steph-father didn't seem to recognize how sick se was before this happend, they where aware of her irrational behavior, but to my opinion they trivialized it for way too many years. I've warned them many times that she needs help and shuld be forzed into treatment, but they failed to do anything. Now I feel reliefed, but I almost want to say to them "I told you so", but I know that would be very cruel. 

Her behavior is extremly selfish and she can at times be very controlling and demanding. Her physical healt is also not good, and she is using it to the fullest to get attention. The latest years she has isolated herself at home, claiming she's allergic to any strong smell/electrisity etc etc. I have also noticed that she is jealous at me, and sometimes try to put me in a bad light/make me feel unwanted. I know that much of it comes from her mental illness, but i can't help it, I really can't stand her.

My SO doesn't tell me much about the situation, but I know that his mother left him when he was a kid, and has never been there for him. She actually almost made him break down mentally a cople of years ago, with her demands and irrational behavior. I feel that he owes her nothing and I'd prefer not to have her in our lives at all.

How can I support my beloved SO in these diffucult times, when all I want to say to him is to stay away from her?
<bot>: Mother-in-law has tried to kill herself, and my SO needs my support, but I don't really want her in our lives anymore.