Yako's head whipped up before she could stop herself, shock painted clearly across her face. He knew? Lucifer knew about the Black Blood? She forced herself not to jump to any conclusions and tried to think.
"I..." she licked her lips nervously and looked away once more. "I think so. I-I think I was the only one she injected anything into, anyways..." Admittedly not one of her brightest moments but she had been semi-delirious from nightmare-fueled insomnia.