Is it permissible for a husband to favor one of his wives by spending more nights with her than with the other due to her pregnancy and childbirth?

If a man marries a second wife, he is obligated to be just between the two wives in terms of lodging, and it is not permissible for him to prefer one over the other, even if the second wife is pregnant or has children. If there is a need or necessity for him to enter upon one of them on a day that is not hers, there is no sin, provided that he does not exceed the extent of that need or necessity.