My Mom was in a car accident one night on her way home from work. She was in a minivan that rolled multiple times due to icy road conditions. Thankfully a man, Matthew, showed up and helped her out of the van, he put his arm around her and walked to the closest house on the road to get help. They walked about a mile through a snowstorm, it was cold and she kept her head up against his shoulder while he had his arm safely around her, he was wearing a long suede coat, she can still smell it when she thinks of him. Its amazing what Love we share as a community, how we assist one another, and How much we all care, never forget who we are. When they arrived at the house a gentleman opened the door, his family all came down to check on her, and call the police to report the accident. When My Mom calmed a bit she realized Matthew wasn't in the room, she asked them to get him for her. They said You were alone, no one was with You, Who is Matthew? She Knows.
https://youtu.be/1SiylvmFI_8

Amazing, we are never alone.
Only God knows when it is our time.
And as my Son told me about 6 months before he died in a crash, "When it is my time to go nothing and no one can change it, you can't change it"

As with many like your Mom and many with a NDE it was not her time.
God makes that decision I believe.

So happy for you to still have time with her.
Love you.