Hi Paul,
Welcome to the forum. I am Anthony's wife (you will see a number of my posts here) and many of them talking to other spouses or simply highlighting the difficulties that I have with Anthony. Communication is one of the bigger things that bites me on the butt about Anthony. Lets face it, most guys aren't the biggest communicators generally, black/white, grunt or nod usually is the sum total of contributions to discussions. I suggest that Kym is simply chatting to the people on your car club for support. We girls need to talk and not always to our spouses, although it would be nice to be able to from time to time. It is probably just her way of getting things of her chest and in reality its a good thing that she does. As a support person of someone with PTSD it can be very hard, isolating and lonely if you allow yourself to live without talking to others. Anthony will be able to put a better spin on things from the blokes perspective but that would be pretty much it from Kym's, I would imagine.
One other thing that will make it harder for her is if she knew you before you had PTSD. I didn't know Anthony, although he was undiagnosed until 2003, he was always a little odd. Things only escalated for us dramatically after he did a return deployment os, kind of like one wasn't enough, so lets give you another to reinforce it.
So, yes we are in a similiar situation to you but like Anthony says many times on this forum, it is kind of irrelevant how you got PTSD...........the fact is that you have it and you have to learn to live with it. How do we deal with it? Its a struggle, daily, but we are starting to find our own feet as a couple there. We used to work in opposition to one another and that just created chaos for us, horrible to live in and very stressful. Not what you need if you have PTSD and not nice for the spouse either. The best thing we ever did was do that PTSD course together. Anyhow Paul, there is a heap of information on this forum and lots of various experiences dealing with PTSD. Please browse, ask questions and vent as you need to.