Halloween-style question: Are you familiar with the story of La Llorona/The Woman in White?
Sure just what I need. Another pissed off woman...
Not that one. The only _The Woman in White_ story I know is a 1859 novel by Wilkie Collins, considered one of the first detective novels.
It's a ghost story in North/Central America. Wikipedia version: en.m.wikipedia.org/wiki/La_Llorona
Basically, it's a woman who killed her children for a reason that changes, then haunts around where she subsequently kills herself, either kidnapping children or killing men.
If you have Netflix, there's an awful Mexican movie called La Llorona, animated, about defeating her. Also, Supernatural (the series) talks about her, a different variation. in their pilot. It's also on Netflix.
So did Grimm
I haven't seen it. But it's a very popular concept when ghost stories come up.