Since gender identity and sexual orientation are separate things, anything is possible.
But I need to also comment on how you wrote your question.
First, you said "hetero man". She only appeared to be a man, she was always female. As far as who she was dating at the time, pre-transition a lot of trans people do as other people expect them to do.
Next, you say she "became" a trans woman. Again, wrong. She was born transsexual (gender identity-body mismatch). When trans people transition they affirm their inborn gender identity; in her case female.
Last, you ask "is this the normal course of events". You can't generalize that way. Trans people can be of any sexual orientation and sometimes their sexual orientation may APPEAR to change. It doesn't really change, once they have their gender issues resolved they are finally free to be their true self. For some that means their true sexual orientation comes to the fore, whereas before it was suppressed.
In short, trans people are just as complicated as any other group of people.
me-woman who was born transexual (post-op)
· 4 months ago