My wife wants to bring her parents to live here. Should I agree?

This matter is not easy to solve. No matter which parents live together, there will always be friction at first and their living habits will be different. Actually, your daughter-in-law said that her parents might not be able to live with you. Let them stay for a while anyway. No matter whose parents are bad, they should be filial. If they are not allowed to come, your daughter-in-law will definitely disagree and will quarrel with you. You might as well let them come. You should be kind to her parents.