Nick Clegg saw his wife Miriam unexpectedly taking centre stage during a question and answer session on paternity leave and childcare.
Mrs Clegg interrupted the Sheffield Hallam MP and said men who believed in gender equality and looked after their children had ‘the most cojones’.
And she went on to criticise ‘dinosaurs’ who believed such work was not for men.
The deputy prime minister, who in the past has taken paternity leave, said he ‘massively agreed’.
“I of course agree with you. I always do,” Mr Clegg added.
Mrs Clegg’s comments came after her husband backed radical change to the leave system, saying the current 52 weeks of maternity leave could be shared between parents.
She said: “There are many, many dinosaurs - not here, out there - who still think that a man who takes care of his own children, he is somehow less of a man,” she said.
“So if you and other modern working fathers start saying not only loudly, but also proudly, that taking care of and being responsible for your children does not affect your level of testosterone - and that those men who actually treat women as equals are the ones with the most cojones.”