Phaedra didn't ask. If Molly and Harry had some kind of connection that enabled that, she wasn't going to be surprised. Or question it.
She wasn't sure who Saerian would try to hurt more--Lindsey or Harry. If Molly thought she could find Harry, they'd be going there first. Phaedra couldn't find Lindsey.
Not without help from someone like Harry.
The people in her dream didn't vanish. They simply stopped paying attention to Phaedra. She couldn't quite stomach the idea of them vanishing outright.