You wife is not a kid that other are influencing her to take her decision.
If she does not want to live with your parents and all the effort of positive dialogue has failed than legally there is no way. Law cannot force your wife to live in joint family.
You have to make choice between parents and wife then course of action can be planed accordingly, as far as other case are concerned then there fate will be decided on merits of case.
Deepak Joshi & Associates