Sentence:  “Oh, <WSD>mummy</WSD>, would you like the loveliest daughter-in-law in the world? Oh, <WSD>mummy</WSD>, I must marry Flora Dewsley. But I know I am not nearly good enough, <WSD>mummy</WSD>. She knows nothing of the world and its wickedness, and I — Well, mummy, at school, a fellow learns everything. And no man is perfect, is he, mummy?...” 
Meaning of the word marked with <WSD> tags:  mother.