Not with My Wife, You Dont (1966) Tony Curtis, Virna Lisi, George C. Scott

During the Korean War, Italian nurse Virna Lisi falls in love with two American fliers, Tony Curtis and George C. Scott. Lisi marries Curtis after he convinces her that Scott has been killed in a plane crash. She soon discovers Scott is alive, but remains happily married to Curtis until Scott reenters their lives 14 years later.