Can a parent take a child to another house with their lover without permission of the spouse?

Legally, a parent may have the right to take their child to another house, including that of a romantic partner, without the other parent's permission, depending on custody arrangements and local laws. However, it’s often advisable for parents to communicate and reach an agreement about such matters to avoid potential conflicts and ensure the child's best interests. If there are specific custody agreements in place, those should be followed to prevent legal issues.