it might make more sense in my bio or her but it's a little tl;dr
Wellll I'm open to input but right now I have that she worked as a healer in spell damage of the fourth floor of st mungos, met a man, got married, and within months of their marriage started acting strangely. Eventually she went missing and was found two days later screaming at a starbucks -- and got committed to the same floor where she was once a healer. Her symptoms were consistent with repeated/poorly executed imperius/cruciatus curses and she was eventually released back to the care of her husband and is addicted to whatever the wizarding version of opiates are and calming draughts, etc. She has good days and bad days...