Viewed movie 2008 or after on IFC or Sundance TV channel. In English. Black&White. Girl steals money from job, leaves town, parks/sleeps at a rest stop, where her tires are slashed. An older couple traveling in an RV befriends her, taking her along with them, feeding her, etc. Turns out the lady is a prostitute, who turns tricks at truck stops. They pressure young woman to also turn tricks. It gets sicker from there, and obvious they were the ones who slashed her tires. Since she’s wanted for theft, she has very few options. Thanks!