You should teach her alesson and show her who numero uno is

Sounds like someone needs a good back hand to the face to straighten them out.

Take some defensive classes. So then if she does try to hurt you, you can protect yourself without hurting her.

She sounds annoying, Give her a reason to think you'd beat her.

I think that might be enough dr phill for her. The main thing marriages are built around is trust, so I suggest you two work this out. Just be careful about her pulling a knife when you try to talk to her.

Sounds like your wife has a nasty case of Mean World Syndrome. Yes, that's a real term. Mean World Syndrome comes from overexposure to violence in the mass media, e.g. news media coverage of violent incidents, and what happens is that sufferers believe that the world is a way nastier place than it actually is. It's the kind of thing that leads people to arm themselves out of a misplaced fear of violent crime, or demand antiterrorism legislation that abrogates civil rights in the face of the negligible risk that they'll be the victims of a terrorist act.

I'd recommend learning pressure point technique fighting. It's like chi blocking from Avatar: The Last Airbender and The Legend of Korra. This type of fighting allows you to effectively disable your opponent's limbs by hitting the specific pressure points :D

Well, at least she'll be fit. Don't sneak up on her though or else she might karate chop you and split your scrotum in half. Bicycle ride optional.

Sounds to me like Op's wife has more than just trust issues going on. Was she abused growing up or is she out of touch from reality? Get her to talk to a doctor face to face instead of just listening to the one on TV dealing with the worst case scenarios of the world. :p

Next, she'll think you're ******* a toad because he reads too much FML.