Villainous thief Karen Mayron
Karen Mayron (Alessandra Ambrosio) is a villainess from the 2017 comedy, Daddy's Home 2.
Karen Mayron was originally the wife of Roger, which resulted in the birth of their daughter, Adrianna. At some point, Roger and Karen split up, after which Karen married co-main protagonist Dusty Mayron--after Dusty's divorce from Sara Whitaker, who married the films' other co-main protagonist, Brad Whitaker. Karen was briefly introduced as Dusty's current wife in the final scenes of the first film, with Sara expressing her surprise over seeing Karen.
Karen returned in a larger role in the sequel, which revealed that she was in the process of writing a novel. As for Sara, her intimidated and insecure demeanor regarding Karen continued from the first film, though the women attempted to bond throughout the sequel, which included Sara and Karen shopping together. Karen turned heel when she was shown stealing various products, with a shocked Sara catching the villainess in the act and confronting her, leading to Karen revealing that she is a habitual shoplifter.
Following her admission, the evil Karen attempted to coerce Sara to help her in her latest spree, only for a guard to approach the women after witnessing their confrontation. To Sara's surprised, the guard--charmed by Karen's beauty--asked Karen if Sara was a being a problem, with the villainess stating that she was being combative before walking off. Karen's fate wasn't revealed; with the film ending with Sara being pleased to learn that a character in Karen's novel was based on her.