After Vicky and Dave have a car accident, they decide it's time to revisit their living wills and other legal documents. They also decide to ask their friends Jeff and Mindy to be guardians of their children if they ever become incapacitated. Jeff and Mindy explain that they can't accept because they've already agreed to do the same thing for other friends. Disagreements start to flair up between Vicky and Dave once they start working with an attorney, and they end up having a big fight. Larry finds a draft of a post-nup agreement and assumes his parents are getting a divorce. To save their family, he and the other kids set a "parent trap" to force Dave and Vicky back together.