Wicked Woman (1953)

A blonde floozy drifts into town and gets a job as a waitress at a local bar. She sets her sights on the bar's handsome owner, who is married to an alcoholic. Her plans are for the two of them to take the bar's money and skip to Mexico - but a boarder at the rooming house where she is staying discovers her plans, and comes up with a plan of his own. imdb