I have to agree with spaying, however the belief that spaying 'calms' a dog is not true. You may see some, although very minor, behavioral changes afterwards it is more like when she isn't in heat, so you're not really correcting much in the behavioral dept. Have you at all thought about maybe taking her to an obedience class? Not for sit and stay but just to socialize and familiarize her with other animals, and people. Dogs respond to trauma, emotional or physical, and to her being helpless to the break in is traumatic to her and she's trying to 'make up' for not being helpful at that time, to her anyways. Some guardian dogs that are unable to help family/animals tend to lash out. We had a great pyr. come to the animal clinic who had severe issues with sheep, now he was raised with them on the farm since he was a puppy he was 4 when he came to us. Well what happened was they lost lambs to a pack of dogs, the dog was in the barn at the time, saw it, and when the owner returned home said he had cut himself raw trying to get out of the stall in the barn. Since then he would attack the sheep if they ever showed signs of fear, and if any other dog was around the farm he would absolutely go balistic and would attack the sheep if he was in the field with them when the dogs would come around. They brought him to us to put him down, well the vet I worked for is a homepathic practitioner as well. He gave the owner a suppliment called Calmplex which we usually gave to animals that were car sick(works wonders) and people with anxiety problems, which I can say works well, I've used it when I tend to have my stress issues every couple of months. As well as combined obedience class the dog recovered fine, and to this day is a wonderful work dog that has shown to be an excellent breeder, none of his puppies have ever ever had temperment issues. I recomend this course.
Do I think you should spay her? yes I do. I think she should live out her days as a companion animal. With her temperment issues you cannot assure the safety of the puppies or how she will act toward you as well with the puupies. I would talk to your vet see if he can get the Calmplex for you if you are willing to try it, or if you would like I would be happy to send some your way. Let me know. But I would spay her and take her to obedience, let her get socialized again and see if she will re-learn her role as the family dog, and help her understand what happened is not her fault. If you want more info let me know you are more then welcome to PM me.
I will comment that I disagree with the person who said it's sad that the dog wasn't put down already. We don't kill people with PTSS. If the dog was viscious for no reason and has actually had a bite account or multiple biting accounts, especially the owner as I saw one post, I would consider this. However in this case it is a behavior issue from an event and not in the genes. I would try alternative help first before resorting to euthanasia.