not faithful to a spouse or lover; "adulterous husbands and wives"; "a two-timing boyfriend" characterized by adultery; "an adulterous relationship"; "extramarital affairs"; "the extracurricular activities of a philandering husband
An adulterous relationship is a sexual relationship between a married person and someone they are not married to. An adulterous person is someone who commits adultery
not faithful to a spouse or lover; "adulterous husbands and wives"; "a two-timing boyfriend"