She feels a little flare of jealousy of Verity, right at that moment, of Beverly too, and it's not either of their faults that they have people, nor that Marcus is one of the only people old enough to count that she'd consider tolerable enough to stay with. She doesn't begrudge them, exactly, even.
It's more just that she shouldn't have to stay here.

"I know," she says, and she's quietly uncertain if he'll be able to do anything, but she knows that he's doing what he can.

Then Eponine takes a breath and shakes it, lifting her head. "It's better this way, anyway," she says loftily, waving a hand, and unfolds herself, getting up and brushing off her dress, offering him a hand. "If I go back, I can report to you, like a good little spy, and we can get rid of this thing. I don't know why I'm acting such a child. Demon or not, it's a good bit better than the bridges were. That'll get into your head, in the winter. Just let some demon try to spook me after all that."