First I think you're fortunate have had her around, all 4 of my grandparents died by the time I was 20 years old. To respond to your question of how people deal with religious people in times of grief. I just don't pay much attention to it. I appreciate when people tell me they're praying for me as I just see them as a more earnest version of the "moderate" religious believers I usually come into contact and argue with. Though not many people do that since they assume I'm Hindu since I'm Indian-American and that is in fact the religion I was born into.
Heaven is where fantasy meets hedonism. I'm on my way to where cynicism meets hedonism. If you'd like to come with me, bring something because you're not tagging along for free.