husband married his mistress,he found out wife was pregnant, he regretted it! 

Yes! And cowardly, weak, idiotic husbands that allow these vicious mistresses to wreck havoc in their marriages and relationships. Literally give in to the mistresses to hurt, abandon, and even steal from the wife/gf/fiancee to give to them with no shame or empathy. Most of the time it’s because of some sexual encounter as if they can’t get that at home. What man would go out drinking alone with some woman or end up in a hotel naked with a woman and have no idea how they got their let alone if they had sex. Didn’t call wife or girlfriend before getting drunk to let them know where they are, say they don’t like the womsn but somehow allow themselves to be forced into a relationship which includes abandoning wife and children or replacing a girlfriend of several years. All because of a sexual encounter. That’s rubbish. And in this story he abandons a pregnant girlfriend for a psychotic snake, marries the snake, and is already crying. He will be paying child support and the entire family will know what he did. Get the MILs involved. They seem to be more vicious than these snakes these men entangle themselves with.