1. can we file a divorce in our city ?in family court ?
Yes very much as their last reside was your home.
2.will the MOU is valid here in our city ?
No;;; MOU is valid anywhere, EVERYWHERE that is agreement and binding .
3.if any one of us break the MOU will there by legal action taken ? pl advice clearly.
that will depend upon the terms of MOU ,what are the terms shall be binding upon parties...
Just file divorce and get rid of this trouble.