Am I sinful for not spending the night with my first wife, whom I cannot stand, especially since she has pardoned me from spending the night and from my conjugal right, and she leaves the house without my knowledge or permission, and she also has psychological and physical problems?

It is permissible to forgo spending the night with the first wife if she, of her own free will and with the husband's consent, forfeits her right to the division [of nights]. However, she is not permitted to prevent the husband from spending the night with her, unless he consents. And it is not permissible for the wife to leave the house without her husband's permission, unless there is a necessity.