I am so sorry for your loss. I had a very similar one about five years ago. Here is the good news: you will want to walk away from it for a little while...but then you will start to think about it, a little at a time. Then, take your kids to a really good reef store or better yet, an aquarium, and see how they react. My three year old grand-daughter "helps" me feed the fishies and my two year old grandson thinks the crabs are the coolest thing ever. Seeing the curiosity in their eyes and the wonder in their faces will remind you of why you got into this hobby. The joy of sharing it with them will kick start your interest all over again. I promise this heartbreak will pass.