should my brother consider divorce

well, my cousin brother(32m) got married to his wife(30f) 4 years ago and my brother was always against the concept of having a child, and during courtship he told this to his wife even and she agreed about this but for the 2 years has been extreme for my brother as his wife going crazy about having a child , so crazy that one time she almost got pregnant and recently both sides of family had a small Meeting where everbody is convincing him for having a child and this moment he got really angry as if he is a child and need to tell him what to do , so he dopped the bomb and tell his wife and in-laws to consider a divorce as both my brother wants a child free marriage and his wife is still in prime to have a kid