What are the details of the required justice between wives, and does it include spending the night and day, and clothing, especially with the husband feeling guilty towards his first wife and preferring her over him, knowing that he has children?

A husband must be just among his wives in allotting nights, and the daytime is included in the division, following the night. It is permissible for the husband to visit a wife during the daytime, even if it is not her allotted turn, for a need, such as to give her an allowance or to visit her when she is ill. It is valid for a woman to waive her right to an allotted turn or to maintenance, and she has the right to retract her waiver.