He's not under the impression that he is guaranteed to be allowed to include this just because the Knight agreed. The Hollow Knight's answer really might be 'no'. This is for future Lemm to prepare for.

He follows their gesture with an uncertain glance until what they're asking makes sense, and Lemm is very quick to put that to rights.

"No! No. Barely moved while they were here. Seems a careful hand runs in the family." This at least isn't intended as some kind of fluffy little compliment, it's just the truth as he sees it. Lemm approves of it in a much more clinical sort of way.

... Also, this next part was going to have to come to light sooner or later. It comes out in a quiet, gruff admission.

"Had them polishing relics." A nod at the small collection on the dresser. "Seemed to kill the time."