Isaac wasn't the only one who's eyes locked onto the knife until it was completely out of sight. Before Cora could even draw another breath, Isaac spoke. She blinked up at him, bewildered in the worst kind of way. If it was easier to be cruel to Isaac, she would have pointed out that Destiny explicitly said someone with a strong stomach had to do this. Isaac wasn't what Cora could call stable, and after spending almost a week with her uncle of all people, that was saying something. It wasn't a matter of trust anymore. Both of them had gone through so much trauma together that they couldn't even remember. She couldn't ever blame Isaac for behaving the way he had been, even if she was for the most part, keeping it together. It might have been why she couldn't flat out hate Peter, but that was beside the point. It wasn't like she wanted to see Destiny bleed Isaac out. She didn't want him to get hurt. If it meant that she had to remember every single horrible thing she had blessedly forgotten, that was okay. She would do it, not him.
She bristled, rearing up to argue with Isaac, but once again, she couldn't even get in a word. Isaac had made a promise, and as much as it pissed Cora off, Isaac's logic made perfect sense to her. She had lost years, where as Isaac only lost months. She couldn't argue with that. Cora pressed her lips into a tight line, and while she tried to glare, her look was more concerned and scared than anything. She didn't say a word to Isaac. She barely even nodded, but she took his hand and squeezed it, as if to say 'thank you' and 'I'm not going anywhere' all at once.
When Destiny entered the room again, Cora finally got to take in that deep breath. "Isaac. It's going to be Isaac." They were going to find out who had the stronger stomach the hard way.