Nina went through it

Nina lost her husband in season one, a traumatic event that triggered a relapse of her alcoholism. In season two she sparked with Josh, but their budding relationship wavered because of his fixation on finding the Black Door (something he learned about in a journal written by his ancestor, Captain Gideon) which he believed might help him reconnect with his own late wife. That emotional turmoil, coupled with the fact that she never knew what was really going on with her kids because adults can’t remember magic, made Nina contemplate slipping off the wagon again. At the very end of season two, there was a sweet scene in which Bode guided her in using the Head Key—allowing her to re-live fond memories of Rendell—and then told her he had a way she could remember everything: the Memory Key.