"I can't decide what amused her more... the effort I put into the ruse or the fact that I ended up proving her right in the process. [...She said] 'Next time you can save $100 and just assume you're wrong.'"
It's not as uncommon as sitcoms make it seem. My wife--brilliant, hilarious, way smarter and better at things than I am--would probably think it was hilarious, too. It wouldn't work for our situation (we got together too early in life for it to be believable), but I wouldn't expect any backlash.
My wife found out last year that her mom cheated and that her dad was not her biological dad. He didn't know either. 3 months later he died. Then when she found her biological dad, he had just died too. Then her mom got divorced from her current husband.
Ain't NO way am I fucking around with that right now.