Sorry you are going through this. It just sounds like nothing but a pure nightmare.
This may be irrelevant but why did she feel the need to send the video to both you and the old classmate? I would have thought that simply telling you would be suffice. However,if it's the video of their encounter it sounds like a way to hurt you more. If I'm understanding that part correctly.
I don't know much about PTSD and understand she has been through a lot but does she not know the difference between right and wrong?
I think at the end of the day you need to decide if this is worth DB'ing again. Outside looking in (which is always much easier than living it) it would seem that until she gets the help she needs and all her issues sorted out that you will keep repeating this process. You have to protect yourself.
