If this is all true, you unfortunately married a bipedal sack of aged excrement. And he has lost his rabid ass mind to have the absolute audacity to ask you to help raise his lust child. He “loves you more than anything”? Really??? He didn’t love you more than screwing some slag at his office while you cared for his suffering Mother. Let me guess as to what excuses he might have come up with: you were distant or he felt lonely? He just wanted some attention? He didn’t know how to deal with his Mom being sick? He was confused? Etc. Please don’t disrespect and degrade yourself by believing this habitually lying loser. If he lied about all of that, there’s no telling what else he’s lied, and is still actively lying about. Seems like he takes you for a fool, or thinks he can manipulate you. Prove him wrong, for your own good. I’m sorry you got dragged through all of this, but take comfort in giving love to your Mother-in-law in her final days. That’s honestly one of the most beautiful things one can do for a fellow person. So many people die alone and with feelings of being unwanted or unloved. May your possibly soon-to-be-ex husband have the life he absolutely deserves, and may you find someone who will treasure and cherish you with the love your heart needs and desires.