I must admit, I am a little scared to post on this board but I come in peace…My vulnerable, neurodivergent and adopted daughter of nine plays out with two sisters who live on our street. Mum of said young girls has split from their father recently and has now partnered with a biological male, who, to my eyes, still resembles a stereotypical biological male, but, according to my AD2, is a ‘girl’ because he/she/they would prefer to be a ‘girl’. AD2 has fallen hook, line and sinker for the ‘wants to be a girl so is a girl’ narrative. Politely, are there any age-appropriate resources that explain that biology is immutable? I tried to have the conversation about chromosomes etc (thinking back decades to my GCSE biology) but it did not land well. My AD2, due to her early life experiences, is regarded as vulnerable and her autism means that she sees the world in black or white choices with no shades of grey.