It has since emerged, however, that Kate actually bought the dress herself in 2008, and it was she who lent it to her mum in 2010.
Screenwriter Tony Briggs and his ‘mum’ talk about the true events that inspired the story.
I think maybe it was the justification he used for that and how he treated my mum for having what he thought was an affair.
"be silent," 1560s, from Middle English mum, mom (late 14c.), inarticulate closed-mouth sound, indicative of unwillingness or inability to speak. As an adjective meaning "secret" from 1520s. Phrase mum's the word is first recorded 1704.
abbreviation of chrysanthemum, first attested 1915 in the jargon of gardeners.