After my mother died, I found a photo album from my childhood – in one of the photos, a girl was standing next to me, she looked exactly like me

My mother felt betrayed.

"She knows nothing about you," Margaret adds. "Just as you never knew about her."

I let the shock dissipate enough to be able to think clearly.

But I knew one thing: if I was to find my sister, I had to do it carefully.

A week later, I called Margaret.

"I have a request to make of you. And you don't have to say yes."

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