if she is a true dumb................
Sorry, I take offence to this.
Give your wife time.
If it is any consolation. I was such a loyal dub. Everything was by the book. And yet after years I was able to see the light.
My husband knew years in advance but he picked away, pointing this out and pointing that out. Chipping away a little at a time. Planting little seeds. Eventually the brain starts working again and I started to see clearly for myself.
If you really love her don't give up.
I know how hard it was for my husband. I am so grateful that he didn't quickly throw our marriage out the window but had the patience to wait until I saw too.
If you feel like reading more about our experience and how my husband successfully helped me out PM me and I will fill you in on more details.