You both need better communication. Try not to go to court. These topics are sensible and you need to handle them with care. You want lesser people to get involved in this matter. You need to talk to your wife properly. Try to make her change her mind. If possible talk to your in-laws. Try to find out why they want your wife to leave you. It’s necessary to reach a conclusion. Try to convince your in-laws. Refrain from getting aggressive with them, understand that parents often tend to overlook certain situations in love of their child. You just need to calmly talk with them. You possibly find some reason why they want to break ties between you both. Try to join the loose ends. Find out a solution before taking any legal action.