Son divorced due to mother-in-law

The son got married, and everything was fine with them, they had a son, our grandson. We bought them a manor and slowly began to build separate housing for them. But then the parents of the daughter-in-law came to our city and bought a house for themselves, but it was registered in the name of the daughter-in-law. This is where everything went wrong.

Son earnedmoney and continued to build his house, andhis daughter-in-law and mother-in-law began to demand that he invest in their house. This is what startedproblems . The son went to live with us, they don’t give him a child, we haven’t seen our grandson for a long time. If she wants to see the child, then only in the presence of her parents. I see that he loves his wife and son, but does not want to live there together andthe wife does not come to us, she says that she has her own house and that her parents will provide for her and her child too. It's been like this for almost a year now.