Cosette turns back to Joly, as if her father hadn't said a thing.

She won't listen to him say such things, as if none of this had happened, as if he hasn't heard a word she's said at all. But she won't argue with him now, not here in front of kind M. Joly. It's not right to have a family disagreement in a public place, it's not fair to anyone, but if she tries to talk to her father about this at all she won't keep her composure.

So instead, she says earnestly, "Certainly we'll stay and look after him. Visit a little! We shall come ever so often. My father's rooms are upstairs. Do you think he's strong enough to move to them? I'm sure it's more comfortable, but it's whatever you think best, monsieur."