S1·E2 One Night Stand?

After Joan reveals that she hasn't had sex in a year, her friends push her to go for a one-night stand. Joan is reluctant because she generally doesn't sleep with anyone until she has been in a relationship for three months, but tries to make a move on Davis Hamilton, a handsome man who owns the restaurant the girls frequent. She convinces Davis to drive her home and makes a pass at him, only to learn that he is engaged. Although nothing happens between them, Joan tells Toni and Lynn that she slept with him. When the girls blab the news around town, Davis' fiancée dumps him, leaving Joan to struggle for a way to clean up the mess.