Why restrict only on wife's pee? Why not other people too? If you have a fantasy of drinking golden shower, let every one pee on you. Any body extract is harmful, be it pee, poop, sweat or breath (carbon di oxide), whatever comes out of our body, our body system is like this, that is harmful.
Anyway, some gentleman used to drink his own pee, and he was a Prime Minister. You can try your luck on drinking your wife's pee, you can be Home Minister. I am not talking political belief, I still dont get the logic why people will have a pee or scat fetish? Pee is usually acidic, try avoiding it.