Ginger Ale Afternoon (1989)

In Ginger Ale Afternoon (1989), the extremely pregnant Jesse (Dana Anderson) discovers that her husband, Hank (John M. Jackson), has been stepping out with—and sticking it to—their oddball trailer-park neighbor Bonnie (played by Yeardley Smith, who supplies the voice of Lisa on The Simpsons). Fury ensues, Hank gets the boot, and when Jesse goes into labor, she gets help from the least likely good Samaritan. Yeardley bares her Snowballs I and II, but not her Homer base. All told, Ginger Ale Afternoon is a fizzy, fun way to spend a day.