Gee, what a hard thing for your whole family to be going through. I'm sorry.

Well, it can be amazing just what even stress can do to us.... and then if depression is added.... it can take on many different looks-IMO(- in my opinion).

It sounds more like delusional problems than PTSD though-- but then, PTSD can have varying affects on a person too. It's hard to say without talking directly to her..... and anyway I'm far from being any kind of expert. I have been diagnosed with PTSD-complex from my childhood... and various Personality Disorders..... so I only speak from my experience.

I hope your family will get some definite help soon and that your sister will be home and doing much better.

mandy