He cares, but not in a way that would make him not want her to look around. Just in the way that, in general, he cares about her and would prefer she not hate the place. Somewhere buried too deep for anyone to read, he's shaken by her affection - though, like everyone, he's sure she wouldn't offer it she knew why.

(Ace is fine with indifference. He's not a cuddly dog; he's trained to do a job, and was never raised as a house pet.)

Bruce boils water and uses Cassandra's tea bags, eventually handing her a cup. There's a sofa shoved into the open space opposite the kitchen - probably not where it should go, but he's working on flooring in other parts of the townhouse - if she'd like to sit.