Ohbehave You can't identify as a "sex". Sex is a biological fact that cannot be changed, and is rooted in your chromosomes. You can only choose to identify as another expression of "gender".
Prisons are not segregated on grounds of expressions of gender. This is the flaw in the transgender argument. If prisons were segregated on grounds of gender expression, then there would need to be parameters as to where each gender expression started and stopped. For women, this would mean a fairly conservative view of feminine gender, encompassing behaviour, thought and appearance, a conservative view that many transgender activists support without actually understanding what it is.
The reality is that this expression of feminine gender in practice would preclude a significant number of transgender women from the female prison estate, including Tara Hudson. There is no way that you could argue that penetrating an orifice with your functioning penis is feminine gender behaviour. Nor could you argue that someone who has fathered children through inseminating a biological female with sperm using their penis is feminine gender behaviour.
Indeed, there are a range of behaviours seen from transwomen activists that would preclude them from being identified as "women" under the parameters of feminine gender behaviour.
This is what so many transwomen do not understand about the real restrictions of the "feminine gender". They are subscribing to something that they know very little about in reality. Femininity, as expressed through gender, dictates that "women" do not headbutt barmen, that women are not vocal, aggressive, assertive, that women put others before themselves. By these parameters, Tara Hudson would not be a "woman".
The feminine gender is a whole prescription for existence: the way you act, move, think, behave, respond, appear. It dictates interests, beliefs, hobbies, habits, concerns. Why the hell do you think feminists have been fighting it for so fucking long? Gender is a totalitarian state. Transgender activists have resurrected the monster, and they do not realise how destructive it really is -- for their damn cause.