I admit I struggle with this. My son is trans and we've always supported him. The one part that's hard is when I'm talking to friends about things when he was little. It just feels so strange to say "One time he was playing with his Barbies, and..." or whatever. And, when I'm talking about something and picturing him as I say it, it's so easy to use the wrong pronoun, even when the story has no gender norms in it.