Adulterous

adj. pertaining to adultery, unfaithful, involved in adultery; illicit; not genuine

Adultery is voluntary sexual intercourse between a married person and one who is not his or her spouse. Some legal jurisdictions have defined it as "crime against marriage", opposed to infidelity.
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Adjective
1. characterized by adultery; "an adulterous relationship"; "extramarital affairs"; "the extracurricular activities of a philandering husband"
(synonym) extramarital, extracurricular
(similar) illicit
2. not faithful to a spouse or lover; "adulterous husbands and wives"; "a two-timing boyfriend"
(synonym) cheating(a), two-timing(a)
(similar) unfaithful

(a.)
Guilty of, or given to, adultery; pertaining to adultery; illicit.
  

(a.)
Characterized by adulteration; spurious.
  

adj.
چھنرا , چھنال , بدکار , فاحشہ