How is it possible to reconcile the care of elderly parents with the duties of a wife, given the frequent disagreements between the mother and the wife regarding household management, and the son's inability to provide a separate home?

You and your wife are blessed with abundant good due to your righteousness and patience with your parents. Continue in this path, and do not abandon this good, for you will find its consequences in this world before the Hereafter, knowing that the wife is not obligated to serve her husband's parents.