Dr. Evans looked down at the numbers, then up at me with profound pity. “Sarah,” she said softly, her voice steady but heavy. “I’m so sorry. Based on these markers, it is biologically impossible for David to be the father of any of your three children.”

The drive home is a blur. I didn’t actually make it home. I pulled into the empty corner of a grocery store parking lot and sat in my car for two hours. The windows fogged up. The world moved past me in silhouette. My mind was screaming. I have never cheated on my husband. Not once. Not even in my thoughts. We were high school sweethearts. He was my first, my only, my everything. How could these children not be his, if they were undeniably mine, and I had never been with another soul? The paradox was tearing my brain apart.

Finally, unable to breathe past the lump in my throat, I dialed David’s cell phone.

When he answered, the normal, cheerful cadence of his voice cut through me like a knife. “Hey, babe. Everything okay?”

“David,” I choked out, the tears finally spilling over. “The blood bank called. They verified your type. AB negative. David… the kids. Dr. Evans said it’s impossible. What is happening? Please tell me what is happening.”

I expected confusion. I expected him to laugh it off, to tell me the blood bank made a mistake, to get angry at the accusation. Instead, there was nothing. Just a vast, hollow silence that stretched on for so long I thought the call had dropped.

Then came a sound that frightened me more than anything else—a heavy, deeply defeated sigh.

“I’ve known since the first one was born, Sarah,” he whispered. His voice was dead, stripped of all emotion. “I ran a DNA test on the twins when they were three weeks old. None of them are mine biologically. I’ve always known.”

“How?” I screamed into the phone, gripping the steering wheel so hard my knuckles turned white. “How can they not be yours? I have never been with anyone else, David! You know that! I gave birth to them!”

“I know you didn’t cheat on me, Sarah,” he said, his voice cracking for the first time, revealing a well of immense, long-buried agony. “You don’t understand what happened. But I stayed. I raised them, and I loved them, because the real father is someone who would completely destroy this family if the truth about his identity ever came out. If he finds out they exist, he will take them from us. He will ruin you.”

“Who is it, David?” I begged, sobbing openly now, the car turning into a cage of horror. “Who is the father?”