CONFESSION: Pretty much from our first date when I passed out in his lap drunk, my husband called me Wifey and I called him Hubby. I know, I know, it's revolting, cutesy and twee as duck and if you knew me IRL you would know I would make sick faces at anyone else doing this and take the endless piss out of them, (rightly so). Please don't judge me too harshly you bullying ninnies.
So I agree it's just a term of endearment and not because they're actually married.
On no planet would Jack the Narc have got married and not banged on about it for all eternity.