Hi mike79,
I'm sorry to hear about your wife's issues with PNES. You may find some help and more understanding about this here -
What is PNES? - Psychogenic Seizures Community
It can be a difficult discussion to have with your wife, but it seems it would be a good idea for her to get to a therapist while also seeing a neurologist and co-ordinating their care of your wife.
I wish you both well and hope you can find the support that you need and deserve.