The most ideal case of such communications might be that, after once or twice the host offers bubu zuke which the guest declines, the host still offers it so that the guest may accept it and get into the house to take it with gratitude.
この場合の理想的なやり取りとしては、家人がぶぶ漬けを勧めてきたら、客人は一旦はこれを固辞し、少なくとも2回断ってもまだ勧めてくるようだったら有難く家の中に上がって頂く。