Lucy couldn't breathe. The message from Mirabel burned in her mind as she stared at her father.
"Dad," she said slowly, her voice shaking. "What's your blood type?"
Jackson, still weak from his ordeal, looked confused. "What? Lucy, why does that…"
"Just answer me. Please."
"O-negative. Universal donor. Why?"
Lucy's hands trembled as she pulled up her own medical records on her phone—records she'd provided to William's doctors months ago. "I'm AB-positive."
William caught on immediately. "That's impossible. Two O-negative parents can't produce an AB child. It's genetically…"
"Impossible," Lucy finished, her world tilting. "Which means either Dad isn't my biological father, or…"
"Or your mother wasn't who you think she was," Jackson said quietly. Too quietly. Like he'd been waiting f
