Talk to your in-laws properly. Try to change their mind. Now, you both are married and divorce is not a small thing. Try to make them like you. Try to impress them. Talk to your wife about this too. She needs to know that her parental side doesn’t want you two to be together. This is a very sensitive topic. She should be well aware of all these. Tell her to convenience her parents. Divorce should be your decision shouldn’t be theirs. Although they didn’t give their consent to the marriage but their daughter wanted to marry you. Make them understand that how happy their daughter is with you.