mother in law

so my mother in law who is bi-polar has come to live with us. I'm not sure what ive done to deserve this. Im very pleasant to her but when she starts ranting and raving she un-nerves me completely! oh well i guess i have to suck it up.. i have lost 2 lbs.. victory dance! im thinking im going to gain 5 lbs by just eating out of stress... i know i must sound horrible.. but oh well i dont care... i was blessed with a very pessimistic mother in law .. sees the glass half full always! and god help me she fought with my father in law and drove over to our place... she just keeps dissing the poor man! pray for me!