Stepsiblings Riley and Jimmy always fight and argue, and their step-parents, Ivy and Tony, are tired of it. To sort it out, Ivy ties up the two teens together, and an accidental boner manages to calm both of them down as they team up to take care of each other behind their stepdad’s back. When Ivy figures out what happened, she decides that a moment of peace is better than constant bickering. Still, a rope seems too dangerous for the occasion, so she finds Tony’s old XXL underwear and decides to use that as a bonding exercise for Riley and Jimmy.