Yup. They're deluded/lied to "pump'n'dumps". Almost always men try to reconcile with their wives after being caught, leaving the mistress like dumped litter on the side of the road.A guy isn't all that inclined to leave a gal who a) wants to have sex with him, b) wants him to stick around despite all of his flaws, c) doesn't treat him like shit, and d) doesn't cheat on him. He probably won't want to divorce his wife unless she does something truly outrageous.
If you're the mistress of a married man who says he wants to divorce his wife so he can marry you, you are a deluded fool if you think he's being honest. He's never going to leave his wife and you already gave him "the prize".
Some of the time it's the mistress trying to monkey-branch, and it fails miserably. It's kinda hilarious to see, really.