At first, she can't make sense of what he's trying to say. She knew the flood had started that day, but because she hadn't been going through it herself the exact starting point had been something she hadn't even considered. But when she thinks back, she can pinpoint it almost perfectly.

He'd asked her if she felt something. He had, and she hadn't. She hadn't even been thinking about anything beyond the lights going out and the walls closing in and then after that, all she had thought about was looking after Tommy.

And once she reconciles that, the rest falls into place quickly. There's no way for her to know which powers he picked up, but she knows mind reading is common.

"Oh," she says, and for the moment that's all she's got.