It may be an amazing feat of divination that Lucius doesn't expect to feel like a long lost older brother to the one who has his name, here, but probably not -- and this thought is transparent in the twist at his mouth in customary sneer before his next sip of wine. But he is busy, also, chasing the subtle nuances of her expression, mostly to-- maybe-- can some context on how to handle it. Being a doppelganger.

The results are neutral, really. None of this is usual, even by wizarding standards. But wizarding standards does allow for some adjustment to the unusual.

"And yet, you are not. Stands to reason that none of us owe each other anything."