She held up the test like a winning lottery ticket. I should have been thrilled. Instead I sat very still, counting backward through a calendar that didn't add up.

I bought the DNA kit to trace my grandfather's village. Two matches came back. One of them carried a surname I had only ever heard in my own jealous nightmares.

I knew one strange fact about the man I suspected. So I sent my spit to a lab and let the math decide whether I was paranoid or right.

She met me at the door with happy tears and a secret she thought would save us. She didn't know the one fact that made her whole story impossible.

For three years he swore they only ever "sat a meter apart." Then I opened the living-room camera on my phone and watched the distance between them disappear.

I changed my whole life for him. Clawed out of depression, doubled my income, held his family together. Then his ex sent me one message while he was in the bathroom.