Lone Star (2010)

Robert Allen is a Texas con-man who leads a secret double life. As "Bob," he is married to Cat and living in Houston while working for his oil-tycoon father-in-law. Four hundred miles away, he is "Robert" in a second life with girlfriend Lindsey. As he schemes to take control of the oil business and finds himself torn between the love of two women, he must fight to keep his web of lies from falling apart.