“That’s my name,” I said, confused. She shook her head. “No, a different Lydia. A woman from years ago who had this exact problem.” She explained a condition so rare only 30 people in history had it.

It was called Chimerism. The theory was that I had absorbed a twin while I was still in my own mother’s womb. I wasn’t just one person; biologically, I was two.
“Your blood DNA is yours,” she explained rapidly. “But your reproductive organs might belong to your unborn twin.” It sounded like science fiction.
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