@Very-Rusty
Bella was half of an identical twin set, so her sister is still alive but that posts its own set of problems, identical twin, will she have the same medical problems leading to Bella's death down the line.
There is testing going on about that so see vulnerabilities and such.
It was just so fast that Bella went down, one day we are playing in the living room and the next day she is dead. Lilly can't eat yet and right now can't take care of the twin so grandma on her side has the little girl till Lilly can hold herself together.