My husband made dinner that night, and seconds after my son and I finished eating, we collapsed. I forced myself to lie still as if unconscious, and that’s when I heard him whisper on the phone, “It’s done. They’ll both be gone soon.”

Under the papers were fake IDs with his photo under different names. Prepaid phones. Receipts. Printed maps.

Then I found the notebook.

Dates. Calculations. Notes about our routines. What time Caleb ate. What I drank before bed. When we got tired. When Caleb complained of stomach pain. When I skipped meals.

Marcus had been watching us like test subjects.

The final page was different.

The handwriting was darker, rushed.

Day 1: Begin preparations. Find the right poison. Check.

Day 2: Set diversion with work. Check.

Day 3: Test reactions. Begin slow poisoning. Check.

Day 4: Final dosage. Wait for collapse. Check.

Day 5: Execute final phase. Make it look like an accident. Call emergency services after they are dead.

I couldn’t breathe.

The man I had loved had planned our deaths like a business project.

At the bottom of the bag was a photograph of Caleb and me, taken through our living room window.

He had been watching us.

Waiting.

Planning.

Detective Hayes handed me printed messages.

The name at the top made my blood run cold.

Rachel.

Marcus’s ex.

I had never truly feared her, even when I sensed there had always been unfinished things between them. But the messages were not flirtation.

They were strategy.