I hope for a speedy recovery and peace for your mother.

No, she is not in risk of being in sin or going to hell..of course not.

Most woman who believe in the uncut hair doctrine wear their hair up and it can't really tell it's long and it certainly doesn't cover anything that it should when they are praying or being used in prophecy. Remember it's a covering.
My hair covers as much head then any woman lol.