Meh, play stupid games win stupid prizes. Good lesson for both of you. You definitely could have handled it better, but honestly I think it's pretty cool you didn't put up with her BS. I was bullied a lot in school, and some bullies just don't understand any other message.

My ex-wife wanted to do this, but she'd still only do a single load of dishes after waiting over a week to touch them. Then she'd act all like the hero when she washed like 20/100 dishes and was like. "Now it's your turn!"

Moral of the story, don't be my ex-wife if you're going to do this.