The policy of the holy lawgiver is to preserve family institution; hence it considers separation preferable only in exceptional cases, such as precedence of wife's depravity by adultery to the benefit of maintaining the marital life. Explaining the effects of spouse’s adultery on marital life requires details; including whether the marriage is dissolved after the adultery is committed or whether the dissolution or divorce process is preferred; also, what are the rulings regarding the recovery of the dowry, the various forms of adultery before and after the marriage contract, adultery after intromission or after the wife has been punished by flogging (Had). All of these cases require explanation; but so far this issue has not been addressed in detail and in a coherent manner. Although in response to this need, at least six aspects and opinions have been raised among the statements of jurists. This research, applying a library method and a careful study of verses, narrations, and statements of jurists, has explained three important and controversial forms, which are adultery before marriage, adultery before intromission, and the implementation of the punishment of Had for adultery of the wife after marriage and before intromission. It indicates that the marriage of an adulterous spouse is valid and in some cases the dowry of the adulterous wife must be returned. Of course, it considers the permissibility of divorce to be valid in all forms of prostitution.