A Bowie woman is suspected of being a Metro madam, pulling double duty as a subway station manager in Washington and arranging assignations with prostitutes using subway facilities, authorities allege.

Sharon Waters, 42, of the 15300 block of Johnstone Lane, was arrested last month after meeting with an out-of-town businessman at the Farragut North stop and introducing him to a woman, another subway employee, who agreed to perform a sex act for $200, according to charging affidavits.

But the businessman, it turned out, was an undercover Metro Transit Police officer.

He was investigating a complaint that Waters was...