Oh Wood, my heart just hurts for you. Honey, you tried being around her. You tried letting her be around you and the kids. That did not stop her one bit. The sad reality is, she had no bottom. Some don't. It's horrible and terrible, but it is the reality.
Are you in grief counseling of any sort? That may help you.
I think you can only do what you are doing, keep putting one foot in front of the other. Six months is a very short amount of time. I know it's an old saying, but time does heal a lot of things.
I am so sorry. Praying for you and your kids! I am glad to see you check in, I think of you often!