So I finally came out to my brother and my sister. I started therapy in November and HRT in January, so it's been a long process getting to this point, and I don't know why but I had to psyche myself up to press the send button on the emails.
My sister's reaction: 'It makes me so sad to think that you've been dealing with this for so long on your own'.
My brother's reaction: 'You've got to be yourself. As the song says don't worry, be happy.'
Two more steps done on the journey, and something less to worry about. I am very lucky to have such a warm and understanding family.