Movies
The only reason I ain't signing is cause you've turned into some hoity-toity Yankee bitch, and I'd like nothing better right now than to piss you off.
— Jake · Sweet Home Alabama

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
Jake refuses to sign the papers, admitting his reason is pure spite. He accuses her of turning into a stuck-up outsider, insulting the change he sees in her. The refusal comes from a stated wish to provoke some reaction from her.
Context reviewed