In Chapter 29 Mrs. Moreland says "our comfort does not depend upon General Tilney." How interesting, seeing as how Henry later defies his father, goes to Catherine to plight his troth, and is willing to marry her with or without parental approval. Henry certainly is not letting his "comfort" depend upon his father.

On the other hand, it is Mr. and Mrs. Moreland who then decide that their daughter's ultimate "comfort" does "depend upon General Tilney." They will not consent to the marriage until he says OK. Little did Mrs. Moreland know this when she first tried to comfort Catherine herself in Ch. 29.