Thanks for the update, I've been wondering how you and the kids have been holding up. IMO, it sounds like you are doing as expected (if not even better in some respects) for a sudden loss at a young age. I imagine it is really lonely, have you looked into grief support groups? It helped my mom when she needed it, and she is still friends with a few of the women she met (14 yrs later). Some of them, she ended up having nothing in common with after time, but a few of them really grew together.
I remember when she first went, there were many people much older than her, this sort of turned her off at first (she felt like she didn't belong). But she stuck with it and found that many of the 'older crowd' shared the same feelings that she did. They had different circumstances and life experiences, but that was a good thing in many ways. It also gave her time for adult interaction, got her out of the house. Just a thought.
Continued thoughts and prayers for you and your family.