The former Home Secretary, Jacqui Smith, was shocked when reports emerged that her husband had submitted a parliamentary expenses form for pornographic films, which she had been found to have signed off.
Nick Clegg's Spanish wife, Miriam, was hired by the US food conglomerate Kraft just three weeks before the Liberal Democrat leader dubbed its takeover of Cadbury "just plain wrong".
She provided advice for the legal services firm DLA Piper on trade after the deal in 2010.
The Prime Minister was ridiculed for leaving his eight-year-old daughter, Nancy, in a pub in 2012, but his wife, Samantha, insisted that she was to blame for abandoning Nancy because she forgot to check the ladies' toilets on the way out.
Sir Denis Thatcher
(Picture: Evening Standard)
Margaret Thatcher's husband never took Westminster politics too seriously, but occasionally his humour would embarrass his wife.
He was reported to have once said to the Duchess of York: "Has it ever occurred to you to keep your mouth shut?"
The US First Lady, Michelle Obama, suffered a slip of the tongue during a television interview in which she described herself as a "busy single mother" before quickly correcting herself and laughing off the gaffe.
She told CBS she meant to say she was a "busy working mom".