Divorce asked by husband and father in law but am refusing

Sir we have 8 yrs of marriage with 2 children aged 4 and 1 years. My husband has issues of substance abuse alcoholism going to escorts beating me brutally and not looking after household and childrens responsibility..we are both in army ..recently after on spouse posting our differences increased and he again su jugated me to violence n abuse in front of children ...finally on pretext of sister in law she said u must call father in law as he might counsel.him I did and he came to our house and he told me he would counsel him and before going back he would let both of us know how to resolve and lead a better life ....in between however they both came on one side and started picking fights with me on smallest of issues involving children food and other issues like how to control maid etc. At the last day.my father in law took a u turn on his words and told me that they want that I should end everything amicably and happily as it would destroy my and his life if we go for contested divorce so they want mutual divorce...I was taken aback coz this was not the reason y I had approached him....n they both called police that I'm attacking father in law though police did not file any report against me. Finally I told hi. I dont want mutual on this my father In law said that he would meet me in the court....sir I dont want divorce and only wanted him to mend his ways regarding alcoholism and domestic abuse so we could lead normal married life...I had even closed chapter of escorts etc.....what can I do now if they file divorce petition because I dont want divorce