C13 THE MAN WHO STAYED

He didn't cry.

Alexander Knight doesn't cry. Billionaires don't.

He just sat there in that blue chair that was too small for him. The chair he bought himself when Leo was two because Leo said, "Daddy big chairs are for giants, blue chairs are for daddies." So Alexander, who runs a 40-billion dollar company, who fires men in suits without blinking, had folded his six-foot-two frame into that tiny plastic chair every single night for a year to build Legos at Leo's level.

His knuckles were white around his phone.

"Mr. Knight, I'm sorry. You are not the father. I ran it three times. The match is 0%. Leo is not your biological son."

Dr. Patel's voice was still in the room even though the call had ended. I could still hear it. 0%. Not 10%. Zero.

I watched his face. I watched the billionaire mask crack. His grey eyes - Leo's grey eyes - went empty. Like someone turned off a light inside him.

"Alexander?"

He didn't move. He didn't answer me.

I stood in the doorway of Leo's blue room, my hands clenched into my fists so tight my nails were cutting into my palms. Three years. Three years I had kept this secret. Three years I had watched this man who once threw divorce papers at me on our anniversary become a father to my son. Not because the court told him to. Because he wanted to. He showed up at 2 AM when Leo had a fever. He learned how to make dinosaur-shaped pancakes. He sat in that ridiculous blue chair.

And now a single phone call had erased it all.

"Daddy?"

Leo's voice came from the hallway. Small. Happy.

Both of us froze.

Leo ran in, his socks sliding on the wooden floor, his hair messy from his nap. He was holding his Lego spaceship. The one he and Alexander had been building for three weeks. The wing that kept falling off.

"Daddy, look! I fixed it! The wing you said was broken! I did it myself!"

He held it up high, his little face beaming with pride. His grey eyes, those same grey eyes that made every stranger in the supermarket stop and say, "Oh my God, he looks just like his father," were shining.

Alexander looked at him.

For a second, just a second, I saw his whole body flinch. Like someone had hit him.

"Leo, buddy..." Alexander's voice was wrecked. It was hoarse. It was nothing like the cold CEO voice I remembered from our marriage. "Give me a minute, okay? Daddy needs a minute."

But Leo didn't move. Kids feel things. He stared at Alexander's face, and his big smile started to fade, little by little. He looked from Alexander to me and back to Alexander.

"Did I do something wrong?" he whispered.

"No." Alexander pulled him in too fast, too tight. He buried his face in Leo's hair, in that soft brown hair that smelled like baby shampoo. His shoulders were shaking. "You did nothing wrong. You did everything right. You did everything right, okay?"

I had to look away. My chest was burning. My throat was closing.

Dr. Patel had said 0%. Three times. No match.

If Alexander is 0%, then who?

My mind went back three years. The night Alexander left. The night he put the signed divorce papers on the kitchen counter and said, "The contract is over, Sarah. Thank you for your service." Like I was an employee. Like our one-year marriage had been just a business deal.

I had gone to the bar. The hotel bar at the Grand. I had drunk too much. There was a man. I never even knew his name. I never told anyone. I left before morning and I swore I would take that shame to my grave. I told myself Leo was Alexander's. Because I wanted him to be. Because his eyes were grey. Because I needed him to be.

Oh God. Oh my God.

"Mommy?" Leo looked at me now, confused, still in Alexander's arms. "Why are you crying?"

I wasn't. Or I was. I didn't even know. Tears were running down my face and I hadn't felt them start.

Alexander finally stood up. The blue chair scraped loudly against the floor, a sharp ugly sound. He towered over the small room, in his expensive suit that didn't belong in this tiny apartment with peeling paint, but he looked smaller than I had ever seen him. Smaller than the day his father died.

He walked to me, close enough that I could smell his cologne, close enough that Leo couldn't hear us. His face was inches from mine. I could see the red in his eyes.

"Sarah," he whispered, and his voice was low and dead. So dead it scared me. "Tell me the truth. Right now. No more secrets. No more lies. We are done with lies."

My mouth opened. Nothing came out. My tongue was stuck.

"Was there someone else? After I left? Was there someone else that night? The week after? Tell me."

"Alexander, I—"

Before I could answer, before I could lie or confess or beg, my phone rang.

It was loud in that silent blue room.

Unknown number.

My hands were shaking so bad I almost dropped it. I picked it up.

"Hello?"

"Is this Sarah Miller? Mother of Leo Miller? Date of birth March 3rd, 2023?"

A woman's voice, cold and professional. Not Dr. Patel.

"Yes, this is she. Who is this?"

"This is St. Mary's Hospital, Records Department. We need to talk to you about your son's original birth file. We are doing an audit after a complaint. There was a... discrepancy. An error in the lab on the night he was born."

My blood went cold.

Alexander's head snapped up. He stared at my phone.

I put it on speaker with a trembling finger.

"What kind of error?" I choked out. My voice was not my own.

"Your blood type on file is O positive. Your son's blood type on file from his newborn screening is AB positive. That's biologically impossible, Mrs. Miller. An O mother cannot have an AB child. It never matched. We think there was a mix-up in the nursery. Two baby boys were born within ten minutes of each other that night. Your wristband was recorded incorrectly."

The Legos fell from Leo's hands and hit the floor with a clatter. The spaceship broke again. The wing fell off.

The room went silent.

Alexander and I just stared at each other. His face was white.

If Leo is not his son at 0%... and if his blood type says he's not even mine...

Then the boy standing in front of us, in his little dinosaur pajamas, calling us Mommy and Daddy, is not our son at all.

And somewhere out there...

Where is my real son? Where is our real son?

And who is this child we have been raising for three years?