Gail Fleming is Sharona Fleming's younger sister, an actress. Sharona, Benjy and Monk stayed at her house after a small earthquake (Sharona chose to stay with her rather than with Adrian Monk because, to quote her, "I will go crazy slower at Aunt Gail's"). She and Sharona are constantly butting heads because Gail believes that Sharona copies her (moving to San Francisco, buying the same purse, etc.) (Mr. Monk and the Earthquake) Benjy often goes to stay with her when Sharona is called away on business or for personal reasons.