Which sentence is incorrectly capitalized?

a. Next week, I'm going to the museum with my Aunt Clare.
b. Dad, Mom wants to know when we are leaving.

Ans B. I'm not really sure because of the rules listed above the questions (placed below). The first sentence uses "my" in front of Aunt Clare. But, I think that is correct. The second sentence seems to be using both mom and dad as proper names.

Rules listed above the questions:
-When using a term that denotes a family relationship (e.g. mom, dad, brother, grandmother) as a proper noun (as a name), capitalize this term.
Examples:
Dad, can I have your keys?
Granddad loves golfing.
-Do not capitalize this term when using it as a common noun. Generally, there will be a possessive pronoun (my, her, his, our) or an article (the, a, an) in front of the common noun.
Examples:
My mom and dad want me to be home by midnight.
Please pass the peas to your brother.

To answer the question, we need to apply the rule listed above the questions. The rule states that terms denoting family relationships should be capitalized when used as proper nouns (names), but not capitalized when used as common nouns.

In sentence a, the term "Aunt" is capitalized because it is used as a proper noun before the name "Clare". This is correct according to the rule.

However, in sentence b, both "Dad" and "Mom" are capitalized as if they are proper nouns. However, since the possessive pronoun "Mom's" is used later in the sentence, it indicates that "Mom" is being used as a common noun and should not be capitalized. Therefore, the incorrect sentence is b.