OK - let me be the one to say it... "What the HELL were you thinking?" He dumps you, leaves you with small children, you have to move back home, he doesn't pay CS, he fakes your divorce, he is MARRIED! And you hooked up???? What about STDs? What about adultery? Do you think it is ok because the 2 of you USED to be married.
I am GOBSMACKED! Again I ask - "What the HELL were you thinking?"