An Innocent Affair was the original release title for the tame marital comedy Don't Trust Your Husband. Making her first film appearance in six years, Madeleine Carroll plays Paula Doane, the wife of ad executive Vincent Doane (Fred MacMurray). For business reasons, Vincent is obliged to entertain lovely widow Margot Fraser (Louise Allbritton). Misunderstanding the situation, Paula vows to "get even" with Vincent by dallying with wealthy tobacco magnate Claude Kimball (Charles "Buddy" Rogers, who like Carroll was returning to films after a six-year absence). It doesn't take a rocket scientist to figure out what happens next. At the very least, it was nice to see Fred MacMurray and Madeleine Carroll working together on-screen for the fifth (and as turned out, the last) time. Much of An Innocent Affair is a thinly disguised advertisement for "Prince" Michael Romanoff's Hollywood eatery.