Atonement

Abby and her brother Drew are working their way across the country on 'vacation' when Abby decides to look for work at a Tribal Casino. Dylan and Kyle Standing Bear are both so smitten with her that they hardly notice the younger brother--until the night he wins over a hundred thousand dollars.

Then, they realize they'd been conned and robbed.

At least that's the way they see it and they make it clear to Abby that they expect Atonement.