"she got them from her family and schooling and environment."

Except that virtually the whole family disagrees with everything Karen does in this book. And as someone (maybe you?) pointed out, while Mrs Marlow does side with Karen on the Tranter house thing, that could well be because she just wants the whole oiling of them Out. Of. Her. House. as soon as possible and at any cost! With which point of view I must admit I *can* sympathize....