Is it permissible for the wife's family or the husband's family to enter the marital bedroom, and what are the cases in which it is allowed?

It is not permissible for anyone from the wife’s or husband’s family to enter the couple’s bedroom except with their permission. It was narrated from the Prophet, peace and blessings be upon him, that he said: "It is not lawful for a woman to fast while her husband is present except with his permission, nor to admit anyone into his house except with his permission," and "You have rights over them that they should not allow anyone you dislike to sit on your beds."