Anything and everything is possible in samsara. Just as when Mr. Garrison in South Park had a sex change and (s)he found out that (s)he is a transgender lesbian, I bet there is such person in real world too.
Actually, back in the mid-eighties, I read an interview with a transgender lesbian. They were married, as a man, to a woman and then decided to become a woman. They had the sex change and realised that, as a woman, they were sexually attracted to other women and thus remained happily married to their original wife.
"Meditation is familiarisation with realisation"
Jigten Sumgon Gonchig: The Single Intent, the Sacred Dharma
"Oh great bodhisattva, you ought to understand the quintessence in this way: Whatever appears is one in its suchness. It cannot be falsified by anyone. The sovereign of unconceptualised sameness dwells in the spirit of the Dharmakaya which cannot be cognised."
The All Creating Sovereign, Mind of Perfect Purity.
"Ego is constantly attempting to acquire and apply the teachings of spirituality for its own benefit."