Just show her some porn movies where the girl is degraded. Facial humiliation, chicks gagging, shit that obviously the girl is only doing for the cash.
Videos with guys doing the high five after fucking a chick, and leaving her to clean up the mess work well aswell. Theres a ton of videos you can use
If she's headstrong, and has a defiant attitude, then being humiliated/used/abused then discarded aint gonna appeal to her.
That should work.