Is it permissible for an unmarried girl to enter the house of her father and his wife without seeking permission, given the lack of a good relationship between her and her stepmother?

It is not permissible to enter the father's house without his permission, and permission must be sought when entering the house if the father and his wife are present. If the person is a mahram and lives with the homeowner, he is not required to seek permission, but he must inform the homeowner of his entry. If he does not live there, he should not enter except with permission if the door is closed. Furthermore, maintaining ties with the father's wife is a form of showing dutifulness to the father.