Two strangers meet on a train, they go to a hotel room. A 'robber' breaks in, ties up the man and 'rapes' the woman, steals their wallets. He threatens to tell their families of the affair if they call the police. It turns out to be a con and the woman was in on it.

Derailed (http://www.imdb.com/title/tt0398017/)

Derailed (http://www.imdb.com/title/tt0398017/)

Thanks a lot, that's it.

You're welcome.