This is why relationships between intelligent women and hunky shirtless men don't last long.
Hahaha, just kidding. Sorry, less-hunky shirted men and knuckle-dragging women.
The most hurtful grammar nazi attacks are the ones that skillfully combine lessons in possessive pronouns with an unsympathetic performance review of one's genitalia.
Although if she's going to give a lesson on grammar, she'd better make sure she's using the correct verb form of the first-person plural ("so we don't sound like an uneducated dumb fck").