Is the husband considered unjust to his wife or to himself if he prevents his wife from visiting her family except two days a week, and prevents her family from visiting them except on specific days, with the aim of preserving the privacy of his home and mending the marital relationship?

A wife should safeguard the privacy of her home and not disclose its secrets to anyone. Her obedience to her husband in this regard is obligatory. There is no harm in limiting your wife's family visits to two days a week or preventing them from coming up to your home except on specific days if you fear a detriment. However, if they live in the same house, it is better to try and reform your wife so that she stops divulging secrets.