David Copperfield Peggotty Quotes

Me leave you? I think I see myself. Peggotty go away from you? I should like to catch her at it [...] I'll stay with you till I am a cross cranky old woman. And when I'm too deaf, and too lame, and too blind, and too mumbly for want of teeth, to be of any use at all, even to be found fault with, than I shall go to my Davy, and ask him to take me in. (8.60)

Peggotty seems to regard Mrs. Copperfield as her own. She swears never to leave her, and she keeps that promise, even though she has received a proposal of marriage and sharing the house with Jane Murdstone is agony. What do you guys think about this idea that servants can be part of the family? Can they truly belong to the family that employs them? And how do the other characters in the novel feel about Peggotty's place in the Copperfield-Murdstone household?