My Step-Brother is My Ex?! Episode 7 begins with Dean talking to his friend about meeting his ex-girlfriend Hannah, who dumped him. His friend reminds him that Dean's stepsister name is also Hannah. But Dean refuses to believe they are the same person and calls it a nightmare to have your ex have your stepsister.
Meanwhile, Hannah meets with Elise, who pulls out an act to call Hannah a homewrecker who stole Dean from her in the past and makes the party believe Hannah is desperate.