Man's Plaything (1920)

While working as a flower girl in Devlin Maddox's nightclub, Nellie Vaughan meets wealthy young Pelton Van Teel and falls in love. Maddox, desirous of using Nellie to blackmail Van Teel, spreads a rumor that she is his mistress. This makes Nellie uncomfortable, and she demands that Van Teel marry her immediately, to which he agrees. Meanwhile, Van Teel has been losing money gambling to Maddox, who threatens to break up the marriage by producing a worthless check that the young husband has written. Venturing to Maddox's apartment for a showdown, Nellie pulls a gun and demands the check, accidentally shooting Maddox when he throws a lamp at her. Maddox plans to charge Nellie with assault, but when the police arrive, his butler, actually a detective employed by the elder Van Teel, exposes Maddox, who is then arrested, clearing the path for the couple's happiness.