The Miracle of Morgan's Creek (1943)

Trudy Kockenlocker, a small-town girl with a soft spot for American soldiers, wakes up the morning after a wild farewell party for the troops to find that she married someone she can't remember--and she's pregnant. Norval Jones, the 4-F local boy who's been in love with Trudy for years, tries to help her find a way out of her predicament. Trudy complicates matters further by falling for Norval, and events snowball from there.