My sister blames "close family member" for the fact that she is a drug addict 25 years later.
My mom still blames my dad for leaving her emotionally abandoned 35 years ago...
Your sister probably blames someone for some of her choices...
I blamed my husband for my depression...
My husband blames me for the impending divorce...
And so the circle goes, right? Well, you're a very sharp lady and you already know there isn't a thing you can do about someone's blame. Especially blame so utterly misplaced as your H's in this situation. He needs to deal with that himself. But when his venom is aimed at you, that's a problem. Especially since you just seem like such an incredible person.