Adultery is a serious crime in Islamic Law [along with Torah and Bible]. "If a man commits adultery with another man's wife both the adulterer and the adulteress must be put to death" (Lev. 20:10).
Whoa, what happened to the lashes part.
As for those who engage in the crime without marriage, known as fornication, the punishment is lashes and exile for a year. They may, however, get married after their punishment and after they have repented for their crimes and desist from it.
So let me get this straight you can't have sex before marriage because it against the religiuos law.
I don't understand the question. Contraception is permissible, but in certain instances it is discouraged. It is up to the couple.
Well it sounds as if it's not. You can't have sex before your married, your not supposed to have sex when your married unless it's for pro-creation.
I should clarify, when he is engaging in an criminal act, no one is Muslim. If they repent later for their crimes, then God can choose to forgive them or not based on if they are sincere and if they desist form the act.
Then only when they are good and decent are they considered to be Muslim.