So sorry to hear of your sudden loss. Please try not to feel guilty or blame yourself. We can't be there 24/7, as much as we would like to!
In time, may the wonderful memories you have of her fill your heart with gratitude to have even been a part of her life. Sounds like Dilly had a grand furr family to me

This is a big loss, so your children seeing you cry is showing outwardly how much you loved her, and is a part of life.
RIP Dilly.