Maybe there is much more then you are relating, but from your description it looks like anxiety. Your W is high strung and high energy. Undoubtably there was significant truama in her past, but I dont see what I recognize as OCD, from seeing others with unmistakable OCD.
Most people I know lock their doors all the time too. Especially women, and even more so women alone. Like you I find this strange, because I rarely lock anything, and my doors are always wide open, but that doesnt make them OCD. They are just exhibiting self protecting common sense.
Not trying to create a argument with you or disbelieve any Councelor/therapist. Just curious.
