At 3:07 a.m., rain scraped the glass walls of my house, and I watched a stranger save my son from someone I had known for years.

Lina slid the warm bottle out of Clara’s hand and dropped it into a clear evidence bag.

She did it fast, almost mechanically, but not carelessly.

This was not panic.

This was practice.

“Don’t give him that,” she said again.

Mateo was still trembling in his crib.

His tiny chest hitched in short, broken pulls.

Lina kept one hand near him while keeping her body between the crib and Clara.

Clara stared at her as though the girl had forgotten what room she was standing in.

“What exactly do you think you’re doing?”

“Protecting him.”

“You are a nanny.” Clara’s voice turned silky, the way it always did when she was about to cut someone open without raising her volume.

“You feed him, you change him, and you stay out of family matters.”

Lina’s face was pale in the infrared camera, but her voice did not shake.

“He gets worse after your visits.

I documented every episode.”

Then she pulled out a notebook.

Not a diary.

A chart.

Feeding times.

Crying spells.

Oxygen dips.

Temperature changes.

Notes about unusual drowsiness.

Dates Clara had entered the nursery.

Dates Mateo seized within an hour.

Even through a screen, I could see the pattern.

I had missed it because I had wanted a simple answer.

Colic.

Stress.

Bad luck.

Anything that did not require me to reopen the night my wife died.

Lina reached into the drawer again and took out a sealed laboratory receipt.

“Rush toxicology,” she said.

Clara’s eyes dropped to it for half a second.

That half second told me more than words could have.

“You had no right,” Clara said.

“I had no choice.” Lina tapped her phone, put it on speaker, and a male voice answered immediately.

“I’m here,” he said.

Clara’s posture changed.

Just slightly.

But I knew the look.

It was the moment a confident person realizes the room may not belong to them anymore.

“Who is that?” Clara asked.

“My clinical supervisor,” Lina said.

“And he’s recording this call.”

Clara’s mouth thinned.

“You manipulative little opportunist.”

Then she said the sentence that knocked all the air out of my chest.

“You should’ve minded your place the way Aurelia did.”

I was already on my feet.

The tablet nearly slipped from my hands as I ran out of my bedroom, barefoot, through the dark corridor and toward the nursery.

My pulse pounded so hard I could hear it.

By the time I reached the door, Lina was backing away from Clara, one arm extended toward the crib as if she could shield Mateo with her body.

I shoved the door open.

Both women turned.

Clara recovered first.

She always did.

Her expression transformed so quickly it would have impressed me if I had not just heard what I heard.

“Damian,” she said, voice breaking into alarm.

“Thank God.

She’s unstable.

She’s accusing me of poisoning your son.”

Lina did not plead.

She did not cry.

She simply held out the evidence bag with the bottle inside.

“Smell it,” she said.

I took it.

At first all I caught was warmed formula.

Then something bitter, medicinal, faint but wrong.

My stomach