I am pretty sure my mother in law is bipolar--?

Been there, survived this...

Forget about the talking to herself thing. As long as she's talking to herself and not other "people", she's fine. When she starts interacting with people that aren't there, THEN worry.

About the bipolar thing, there's nothing you can do. By the nature of this disease, they don't ever admit to having a problem. If you go to her with literature, you will be seen as "mean, selfish, money grubbing, not good enough for her son, jealous" and all the horrible things MIL's have always said about DIL's.

All you can do is distance yourself.

Lots and lots of distance.

So what if she is? She is not causing any harm to anyone. If she does have bipolar, it would have been noticed a long time ago. Someone with bipolar cannot reach your mother in laws age without coming to the attention of mental health professionals. Even if she is, she should be treated the same as anyone else, there is enough stigma attached to people with mental health problems without family members thinking the worst.

i think of you have executed each little thing on your power. She would not desire to alter and no-you may make her do this. As painful because it relatively is to your husband he's going to would desire to cut back ties along with his mom. This woman won't cease till she sees divorce papers. She needs her son all to herself and he or she sees you as a burden. stable success with the monster-in-regulation.

Hm , I wouldn't make a big deal out of the talking to herself thing. As long as she doesn't say stuff like "Oh hey, what would you like to have for breakfast?" when no one there. I wouldn't worry too much, lol. Good luck though!