Salaam SS,
After reading your post, obviouly we shouldn`t come to a conclusion about either party as there has to be something thats feeding her paranoia, i mean taali kabhi bhi ek haath sey nahi bajtee, lekin to be honest as this is havingg a negative effect on the kid i would suggest this couple to live separately for some time to figure things out and think this through, and if after this time they still think things are going to be the same then i believe its apparent enough that they should take their separate ways. Khair i wish them the best and hopefully as both of them are mature enough should come to a right decision.