Answer: In this scenario, Irwin is discovering that there is a great deal of AMBIGUITY in intercultural conflicts.
Explanation: AMBIGUITY is defined as something, particularly WORDS and SENTENCES, that is open to more than one interpretation, explanation or meaning, if that meaning cannot be determined from its context.
Since Irwin and Wendy are multiracial couples, they definitely will have different cultural norms and preferences. In this question, Wendy wants to spend their vacation with family while Irwin would like to take a trip to a place they've never been before.
This indicates that Wendy might be from a collectivist culture, while Irwin is from an individualistic culture.