When PTSD controls us, or uncontrolled PTSD as often referred, nothing is rational. Putting the toilet paper around the wrong way, even if there isn't a right way in the house, can be enough to trigger a full scale meltdown.
Doing things for her, not doing something for her, any and all, could contribute to such a statement. You could have merely been a friend saying hello and have gotten a similar response. PTSD sufferers are renown for pushing anyone close to them out of their life. The only exceptions to that is possibly family, depending how well they get on with them. It isn't uncommon that a PTSD suffer views family, feels family, as a safe haven for them when the world gets too much. That is if family aren't involved in their trauma.
Even I get that way at times... wanting to leave my wife with things for a week and just retreat to my family. I don't do it, but I want to do it... only because I know the negative, thus I face the issue and then remain, knowing it isn't here that is the issue, but my own PTSD. When uncontrolled, a person doesn't know any of this. I used to bail out and head to family to feel relaxed and safe from the world. Most with PTSD do this... family, a close friend, and even more often, total isolation as their only sanctum to cope with existing.
She may change her mind, she may not... most people with PTSD actually run from one relationship to another as fast as possible, because it closes off the prior, thus pushing that person truly away from them.
