Silence.
The whole house fell into silence, with only the wind whistling to be heard.
For a long time, Remi didn't say anything. And when he finally opened up his mouth, all that he said was a quiet, "I don't know. There was no mention of the cure in the story…"
But his 'I don't know' didn't sound confident. Even if there wasn't a mention of the cure in the story passed from his ancestors, with the key to the curse right in front of him, how could Remi not figure it out? He was a witch himself, he knew a few things about curses. The curse on him might have been impossible for him and his mother to solve, but there was no way he hadn't realized anything about trying Felix's blood.
Even his mother who had just observed everything from the side knew that much. When Felix thought about how Agnes had reassured him that she wouldn't hurt him and she just wanted to take his blood…
She must have known. She must have known that the price to pay for breaking the curse was Felix's life.