Makes me happy that her family isnt the standard "I hate this child so I killer her" route, but rather a parent who seems to care for her child and was finally able to reunite with them.
I think the mom's been turned into an undead or is brainwashed and is just a puppet of those ruling from the dark. Cause no way the author's gonna end it with this, especially after showing us her flashback. My weeb senses are tingling.