Sweet and Sour Surprise

Amy is appalled when Marty throws a lavish birthday party for his wiener dog Tai Chi. What kind of son throws a party for a stupid dog, but never even acknowledges his own mother's birthday (which happens to be approaching)? The chastened kids decide to surprise their mom with a massive surprise birthday bash. True to form, though, they turn this sweet idea into a no-holds-barred sibling competition for their mom's affection.