Separation from husband

Hello to all, I was married 23 years back.but the inlaws have been cruel always blaming me always,I have three kids - 1 boy age 21 and twin girls . my husband with full family support made circumstances for me to leave house as he was doubting me .i left for my moms house with the girls now 13, three years ago. a year later shifted to Delhi as my cousin wanted to help me .she was providing for all school house rent all other expenses.now these so called inlaws calling me back as they dont want to give any maintainence. Husband saying wants to stay for kids on compromise.he is having an affair from past 4 years .i have seen but have no proof. kids also seen.i was never given any money while i was there. a. if i apply for maintainence what chances do i have b. can my daughters get anything if nothing is there on fathers name as after i left from ,they transferred all to sis-in-law name . c. can husband claim divorce on account of me leaving d. i do not earn They are blaming me that i left him as he had no money. i was mentally tortured,beaten and ....