I would hope that most would at least mitigate it by telling their children that, yes, they are their mother, but they like everybody else to think that they're a man.
However, I remain highly sceptical - especially in the case of somebody who has fought a prominent public battle to be allowed to be called her baby's father on the birth certificate.
I think the need for validation and 'passing' is so deeply ingrained in many of them that they simply couldn't possibly bring themselves to admit the actual truth, especially to an unquestioning tabula rasa tiny child - who, of course, would then doubtless blurt out to everybody else what the true situation is, as has been admitted by their mummy-who-isn't-a-mummy.
A lot of this seems to revolve around a significant syllogistic fallacy:
- Your female biological parent is your Mum - this is true;
- Your male biological parent is your Dad - this is true;
- Your female biological parent identifies as a man, ergo that makes her/him your Dad - this is categorically and very obviously false.
Yes, your Dad IS a man, but he is a very specific man and he is the only person who ever can, biologically speaking, be your Dad. Just as no other male in the world could ever possibly become your biological dad, equally, no female in the world could ever possibly become your biological dad either - not even your Mum.