The Last Riddle

The sphinx moth battered itself against the porch light, drawn to something that would ultimately destroy it. Arthur watched it from his wheelchair, the amber capsule of vitamin D dissolving on his tongue like patience itself.

"They're launching the generic version next quarter," Clara said from the kitchen. She didn't turn around. "Fifteen years of research, and now every discount pharmacy can manufacture our life's work."

Arthur had invented that vitamin formulation. Had borne the sleepless nights, the failed trials, the conference presentations where investors looked through him as if he were already a ghost. Now, at sixty-three, with ALS making even swallowing a negotiated surrender, he watched his legacy become commodity.

"It was never about the patent," he said, the words catching in his throat. "It was about—"

"About what?" Clara turned finally. Forty years of marriage compressed into the tightness around her eyes. "About the people who can afford it? The ones who don't need to choose between electricity and medication?"

The sphinx moth gave up and fell to the porch, its wings still trembling.

"About your father," Arthur said softly. "He couldn't afford the prescription version. Remember?"

Clara stilled. Her father's death from deficiency-related complications had driven Arthur's obsession with affordable formulation. That was the riddle they'd both forgotten: why they'd started this in the first place.

She crossed to him, pressed her forehead against his. "I'm sorry. I just—" She couldn't finish. The fear of losing him, of losing purpose, of the silence that would follow.

"The generic means more people get it," he whispered. "That was always the point."

Outside, the sphinx moth stilled its wings, accepting what it could not change. Inside, Clara held her husband's hand and tried to do the same.