"Any circumstance whatsoever, is the impression I've been given," Lucy answers with a shrug. Not that she has gotten any first-hand accounts regarding this. She hadn't asked Peter, and hasn't really had an indepth conversation with anyone else.

See, Zagreus is being a good guest, cleaning up after himself and everything. And yes, Lucy is essentially harmless, after all. It's unlikely she could be much of a threat to him even if she wanted to, unless she was very determined. Like, 'blow him up' level of determined, but she reserves that for her special someone.