kag1982,  God's mercy is geared toward our salvation.  God is also just and holy.  His mercy cannot be used to an unjust end.  He is patient with us, wanting our salvation, giving us time to grow and HEAL, NOT remain in sin.  There is a war between the flesh and the spirit, the Gospels tell us.  Adultery is a sin of the flesh and no adulterer will enter the kingdom of heaven.