Is a wife obligated to obey her husband's command not to open the door of their home to anyone in his absence, including family members, and his stipulation that he must be present when guests visit, despite his awareness that this causes conflict between them and her family?

A wife must obey her husband in what is right, and this includes not allowing anyone into his house without his permission, as is established in the sound Sunnah. Therefore, the wife must obey her husband by not opening the apartment door for anyone in his absence. It is advisable to agree on a solution that satisfies both parties, such as making a phone call before the visit, and then calling the wife upon arrival to open the door, to avoid disagreement.