((QUEEN OF WANDS)) - I'm so sorry you're hurting. You're suffering with a double betrayal from your husband and your good friend -ouch!! I'm familiar with that feeling of being replaceable - it really hurts. I've come to realize though, that it's their fault for being so shallow to easily forget a meaningful relationship.

If he dove in that fast into this new relationship, this means he didn't fix his end of problems. This means their relationship starts on shaky ground and I doubt it will last. She basically is getting your leftovers. We always think they must be so happy and poor me I'm so sad - I doubt everything is rosy for them.

Try your best for the childrens sake to be civil so they don't have to suffer. Knowing that his new partner has to deal with all his crap will make it easier for you to heal. It's not you, it's his shallow nature.