The Bigamist by Ethel Mills

Miss Maitland had been some months in the house before Arnott became in any degree alive to her actual presence. He met her occasionally coming in or going out. Usually she had the children with her, and a coloured girl in charge of the boy. He always passed them, thankful that politeness demanded nothing further than the raising of his hat. Sometimes he encountered her on the stairs, when he felt constrained to make a remark. But she was exceedingly retiring, and appeared quite as anxious as he was to avoid these encounters. She had a habit of effacing herself when he was at home.

But one day when he had been lunching with some men at his club, and returned unexpectedly early in the afternoon with the intention of running Pamela out to Camps Bay in the motor, he found that Pamela had gone visiting; and Miss Maitland, who supplied this information, ceased amazingly to stand as a mere cog in the wheel of his domestic machinery, and assumed a distinct feminine personality that caught and held his attention. She was, he noted, and felt surprised that he noticed this for the first time, a striking, fine-looking girl.