She had no motive; she was crazy. And, for some reason, they stop taking their medicine. Had a relative, manic-depressive, that for years refused to take his lithium. He'd forget. Even though he knew, while his was on lithium, that he needed to take it. ???
RY said AY was taken OFF-- that sounds like she got NOTHING-- not that she wouldn't take it. Relapse waiting to happen.