Here is what you do...
Tell her you're sorry and that she's right. Make her feel like she is in fact superior and has "owned" you.
Then, the next time you're plowing her ass (doggy style), lean in and whisper in her ear "don't you ever mouth off to me again you little girl...specially in public", then quickly Donkey Punch her and immediatelly pull out. You'll give her a Pink Sock.
I doubt she'll ever mouth off again.