Helle Thorning-Schmidt – the daughter-in-law of former Labour grandees Neil and Glenys Kinnock – said she was concerned that Milo, previously known as Camilla, would no longer be able to breastfeed should children arrive on the scene.
Speaking on a podcast series last month in which Milo discussed his experience of changing gender, Ms Thorning-Schmidt said: 'It's a big operation and the only thing I was challenged by was that you can't breastfeed if you have children.
'It's a cool thing to be able to breastfeed your baby.
'I did that myself with great pleasure and I have been very happy that I could breastfeed both my children. It's a big thing to waive.'
Ms Thorning-Schmidt was so concerned about the issue that she questioned Milo – who refers to himself as 'non-binary transmasculine' and uses male pronouns – to the point where he became 'annoyed'.
'But that's fair – my role in life is to test if Milo was completely sure about his decision,' she added.
However, she clarified that she realised that being non-binary was 'quite a cool place to be' because 'you don't have to pick a side'
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