Quote from Martin in The Last Time I Saw Maris
Frasier: You must be exhausted, Niles. Why don't you call it a day and get some rest, huh? Niles: Do you have a blanket for me? Martin: Oh. Now, Niles, you've been going through a rough time lately, you're not sleeping on any couch. You can sleep in Frasier's bed. Frasier: What? Niles: You're sure it wouldn't be too much trouble? Martin: No trouble. Niles: I wouldn't want to impose. Martin: No, don't worry about it, you're family. Niles: Thank you. Frasier: Well, that was very generous of you.