Rose just brought Dean a card. “That means I love you! I love you, and you love me!” Dean: “Yeah!” Rose’s face falls. “But you don’t love me, because you didn’t make me a card!” She stomps out of the room.
Dean has now tried to make her a card, but so far it hasn’t lived up to Rose’s precise specifications. Among other failings, the inside reads “I love Rose — hmmph!” because that’s exactly what she told him it should say. Daddies are so mean when they take things too literally and also not literally enough.