@bemyfriend.
I think you have only stated the obvious. You don't need to be a biblical scholar to know that if a marriage comes under the conditions stipulated in Leviticus 18 that it is null and void. In the King James Bible, the word used by Jesus is "segxwal immorality". Except the original word used means something different, I understand that to include infidelity. To the other posters, ask yourself a question...If a man marries a woman who turns out to be unfaithful, are his only options to stay with her or live a life of celibacy for the rest of his life?