Yes, there is nothing Harriet could possibly have done to avoid this that would have been better than what she did (would it have been better to make Peter miserable by asking for a crap present? No! She's done something really nice and look what happens. Idiot).

Jerry is going to use this one for a very long time. Assuming that Peter does not want this news to get back to his brother and sister-in-law, Jerry is about to be in a very powerful bargaining position.