Is it permissible to interact with the fiancé’s father who has abandoned prayer out of denial (juhood), specifically by eating, drinking, and uncovering the niqab in front of him, given that the residence will be shared?

The father who abandons prayer out of denial is a disbeliever, guilty of major disbelief, and is in a worse state, religiously and worldly, than an original disbeliever. It is not advisable to accept marriage to his son unless the woman can live in an independent dwelling far from the father. The son must advise his father and rebuke him for his disbelief. If he persists, the son must separate from him and protect his family and children from him.