Daddy is not coming back from heaven!

As I was putting Ronak to bed 3 days ago, he softly whispered to me "I hope you know Daddy is not coming back from heaven anymore!". I said "I know Ronak. I think he is quite happy there as much as we need him here!". My poor baby - realization finally hit him that his daddy wasn't coming back from heaven and he wanted to share that with me in a way that was not his confirmation of the thought but he wanted to make it sound like he was gently letting me down on a fact. Both of them have had their hopes so high for so long thinking a miracle would happen and Nook would magically appear in front of their eyes. Even though at some level, they knew what happened, it takes a looooong time in a child's mind for reality to sink in.  I wish I could make it better for them..