Of course there was no chance that he'd forgive her, that's why I can't agree with GF3 plot. And he'd never give children to her.
But I have to disagree with one point, that she realized smth. seeing homage, except that he lied her that he didn't kill Carlo. She knew pretty well whom she is marrying, she chose him and that style of living with her eyes open. She just didn't know that Carlo helped to get Sonny killed, so she was shocked realizing that he could kill his sister's husband. In the book Tom later explains her why Mike was obliged to kill him.