Jo had already started to open the door. She looked back at Molly with another grateful half-smile. It was the most smile she could manage at the moment, and even that was a stretch.
"Thanks again," she said. "If you wanted to let Harry know, that would be nice."
She could only hope that Molly might be able to explain to Harry a bit better what she had seen and why it had set her off like it had. Assuming Harry wasn't quite as skittish as Molly, perhaps he could explain it to them.
She waited for Dean to catch up, even if a part of her wanted to just get out of there and away from anyone. The darkness Molly had seen felt like some sort of contagious disease. Like she was possibly putting Dean and Molly at risk of catching it just by being in the room with her.