Chapter 3 - The Chemical Truth

Marco didn't look like an underground syndicate chemist. He wore a rumpled tweed jacket, thick spectacles, and carried a scuffed black leather doctor's bag that smelled faintly of reagent chemicals and nitric acid.
He set his equipment on my mahogany desk: three glass vials, a series of chemical indicators, a portable centrifuge, and a digital mass spectrometer strip scanner.
Sophia sat in the leather armchair across from my desk. Frank stood by the locked study door, his hands clasped in front of him, his face as hard as granite. Nobody spoke. The only sound in the room was the low hum of the portable centrifuge as it spun a sample of the liquid drawn from the brown prescription bottle.
"Well?" I asked, standing behind Marco, my eyes fixed on the clear liquid inside the test tube.
Marco pulled the strip from the reader, his brows furrowed behind his thick lenses. He ran the paper through a second chemical indicator, watching the white paper turn a deep, violent shade of purple.
He cleared his throat, wiped his forehead with a handkerchief, and looked at me. He was trembling.
"Don Vincent..." Marco hesitated, glancing nervously at Sophia before meeting my gaze. "This isn't a vitamin supplement."
The room seemed to lose all oxygen.
"What is it?" I demanded.
"It's a concentrated compound of thallium sulfate mixed with a low-grade organic neurotoxin," Marco explained, his voice shaking. "Thallium is tasteless, odorless, and water-soluble. In small, controlled doses administered over several months, it causes progressive optic neuropathy, severe headaches, peripheral nerve damage, and eventual total blindness."
He set the test strip down on the leather blotter.
"If the dosage had been increased slightly... it would have caused complete respiratory failure within eight months. It looks entirely like a natural degenerative neurological disease."
I turned slowly to face Sophia.
She was staring at the test tube. The color had completely fled her face, leaving her as pale as the marble stairs in the foyer. But she didn't cry. She didn't scream. She didn't throw herself at my feet to beg for mercy.
Instead, a slow, cold smile spread across her lips—a smile I had never seen on my wife's face in fifteen years of marriage.
"Thallium," she murmured softly, as if admiring the elegance of the word. "I told Harrison he was being too dramatic with the dosage."
Frank let out a low, shocked curse near the door.
I walked over to her chair, my movements slow, measured, heavy. I leaned down until my face was inches from hers.
"Why?" I asked. The word felt like broken glass tearing through my throat. "She is your daughter. She came from your body. Why?"
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Sophia looked up at me, her hazel eyes completely devoid of warmth, remorse, or fear.
"She isn't my daughter, Vincent," she said, her voice dropping into a razor-sharp whisper. "She's yours."