Marrying For Wrong Reasons.

my friend's ex really loved her, and the love between them was epic, everyone used to admire them, and almost everyone wished that they could have a guy/lady like them.

Something changed when my friend got a job in a far town and so the guy started cheating on her, simply because he thought that she too was cheating, the girl that he cheated her with one day came and told the guy that she was pregnant, and she even gave him the test results, what the guy did was to marry her simply because he never wanted to be separated from his baby.

When they got married he came to realize that the lady wasn't pregnant and he had left the girl that he loved, he became so bitter and hurt but there is nothing he could have done since he was already married

Later this week he went to look for my friend after 2years to explain everything, now the problem is that they both love each other and they just can't keep their hands off each other despite the pain they feel on each other
how would you advise them?

the reason the guy is still married to the other woman it's because of the son they now have.