On this week's episode of ABC's "Modern Family," Claire (Julie Bowen) and husband Phil (Ty Burrell) have a playful argument about the fastest route to step-brother Manny's (Rico Rodriguez) birthday party. They decide to take separate cars and race to the restaurant.
Luke (Nolan Gould), their young son, wanders into the room without hearing the argument.
"Luke," she says, "Your Dad and I are splitting up."
"Why?" he asks.
"Another one of their stupid fights," mutters Alex, his sister (Ariel Winter).
On the way, Luke--sitting solo in the car with Mom--tries to get to the bottom of their "break-up".WATCH:
Claire questions Luke, wondering why he wanted to go with Phil. Luke admits that while he thinks Dad is more fun, he chose to go with Phil for a different, more sentimental, reason.WATCH: