Mabel Lost and Won.

Mabel has just gotten engaged during a housewarming party of which her mother is the hostess. When an annoying party guest persuades Mabel to dance with him, Mabel hurries through the dance and then goes to look for her fiancé, only to discover him caressing another woman. Her fiancé finds not only Mabel, but also her mother, very displeased, and not inclined to believe his explanation.