Sorry for your loss. My condolences. My grandmother died shortly after I moved to Japan. She suffered from serious Alzheimer's so she didn't know who I was anymore. My grandfather lasted longer. I didn't have kids yet, but I always entertained the idea of him lasting until he could meet my children. He couldn't wait though and died about 11 years ago. Interestingly, my wife became pregnant only a week or two after he passed away. Due to the timing there, a lot of older Japanese told us our son was my grandpa reborn. Silly superstition, but also kind of a nice and comforting idea.

Anyway, again, sorry for your loss.