''Mother in-law" help--kind of long. PLEASE help?

My ''Mother in-law" has been going down a slippery slope for awhile now. She has never had a wonderful relationship with her son (my husband) and things took a turn for the worst after our daughter was born.

When i got pregnant she was already in the middle of a mid-life- crisis and after my daughter was born she got into a bad car accident and is now on disability. She can't ''work'' (although there are jobs out there i know she can do) and she is on a lot of pain medications. The pain meds make her CRAZY. She has been more than mean to me (and my family). She has sent my husband the meanest texts messages when she doesn't get what she wants from him and she even told him to file for custody for our daughter and kick me out of the house.

She is obviously mentally ill and her back is supposed to be messed up so she has not been allowed to be alone with our daughter and that really upsets her. Her depression has taken over her life and she has her other son so trained that he does everything for her and has taken his life away (he is only 22). She resigned her lease to an apartment that she can't afford and now is being ''kicked out'' <-- i don't know if she is actually being kick out that'st thats just what she told my husband]]. I was told she makes over $1000 a month on disability and her son also helps pay but they have no money. She sits around smoking weed all day making her other son do everything for her. She even kicked her other son out of the house once and forced him to come live with us-- we only had a 2 bedroom at the time so we moved into a more expensive place just to have her other son move back with her 3 weeks later. She hasand she has also attempted suicide once and ''cried wolf'' suicide for attention and to get what she wants from her sons. SHe also said she had a ''heart attack'' and was in the hospital but by the time my husband was able to leave work and get there (a matter of maybe 3 hours) she was already released.

Now that she is ''out of money'' and ''filing for bankrupcy'' she is asking to come stay with us. My husband said it would be for no longer than 90 days but Im sure she would try and stay longer. Especially since his brother was under the ansumtion that her move here would not be temporary. I was blind sided by all of this 2 days ago and the final decision is up to me and I have to make the decision this weekend since ''they have to be out''. I don't want to make my husband chose between us. I feel like this whole situation could have been prevented. I also feel like there is a lot of lies around this situaion. She spent her money friviously and now has none and I am paying for it. In ths nicest way possible this women is C R A Z Y and H A T E S me. She feels i took everything from her. She has been begging him to come and live here for over a year now.

My husband and I have been together for 7 and our daughter is 18 months old. We had plans to get married but she changed all that. My husband also does NOT have a 9-5 job. He is a manager at a popular local resturant and works crazy hours that vary each week (that includes 5PM-3:00AM). I am a stay-at-home-mommy so I would be with her 24-7. I feel like she has been planning this. He feels otherwise and just wants to help his mom out...

SOMEONE PLEASE GIVE ME SOME ADIVCE and thank you in advance.