"and" suggests "therefore" rather than "nevertheless"; with "nevertheless" we would normally expect "but". Apart from that clue, I have no idea what the relationship between the two statements is supposed to be. I have no idea why being "the warm heart of the family" should, or shouldn't, make a room "stuffy to a middle-class visitor".
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.