No Man of Her Own (1932)

Babe Stewart is a card cheat who has to go on the lam to avoid a pesky cop. He meets a lonely, but slightly wild, librarian, Connie Randall, while he is hiding out. The two get married after Connie wins a coin flip, and they move back to the city. Babe continues his gambling/cheating scheme unbeknownst to Connie. When she discovers his "other life", she pressures him to quit. Babe feels crowded and tells her that he is leaving for South America. In fact, he has decided to go straight and turns himself in to the cop.