 Lucy and Vivian are a pair of single parents living at Lucy s house. Lucy s daughter Chris goes out on a date with Alan Harper, a 16-year-old boy attending prep school. Chris feels her mother ruined the date by waiting up and running out to the car when the couple returned. No mischief could have occurred -- Alan s parents were in the backseat because they attended the same movie as the young couple. Nevertheless, Alan asks Chris for a second date and this time Lucy promises not to wait up for Chris. At the end of date number two, Lucy leaves the house rather than appear to be waiting up. However, she gets locked out.