I'd blame the cheating husband and the other woman, but mostly the cheating husband.
I'd leave his a$$, no, kick him out on the street, take him for everything he was worth, make sure every breathing walking woman knew what kind of cheating scum he was, and I'd let the whole world know that she was an nasty, home wrecking mistress.
I've had to do it before, but I'll never have to do it with the same man twice. Burn me once shame on you, burn me twice...I'm an idiot.
I know alot of people can work through infidelity, but I couldn't EVER. Even if we had 3 kids and had been married for 20 yrs, if he cheated, I'd be gone in a heart beat.