Sometimes, siblings are peas in a pod. Usually, siblings are archenemies. In Big Brother, Little Sister, you will meet the Harper family. Overly responsible big-brother Matthew, and his mischievous little-sister Aaliyah are always battling it out with high-stakes shenanigans, under their unsuspecting parent's noses. Making matters worse, Matthew's stressed out girlfriend, Delaney, is always at odds with her own little sister Mindy. Chaos is always the word of the day. All bets are off, and the laughs pour in, when Aaliyah and Mindy team up to take on their older siblings. Will the little sister duo destroy the universe as we know it? Or will we learn that friends and family will always have your back, no matter what? Fire trucks, upside down vacations, and wrecked birthdays are just the tip of the iceberg in this heartwarming, hilarious take on sibling rivalry.