The familial connection between Lena and Lillian wasn’t established until shortly before the midseason finale, but a great deal of Lena’s arc in the first part of Supergirl season 2 focused on her attempting to distance herself from her family’s hateful anti-alien beliefs. Although she eventually sided with Supergirl in the midseason finale, ‘Medusa’, Lena’s loyalties and morality have been up for debate all season. Now, while Kara has complete faith in the goodness of Lena, the Luthor daughter’s loyalties are tested once again in this week’s episode.
As promised by its episode title, ‘Luthors’ pulls back the curtain on Lena and Lillian’s relationship – as well as the mystery surrounding the tension between the two. Lena previously revealed to Kara that she was adopted, using it as a way to help distance herself from the negative connotations of the Luthor name. Plus, Lena also revealed that Lillian was often unkind to her while she was growing up, which understandably drove a wedge between the two. However, as we learn in this week’s episode, Lena is more of a Luthor than Lillian.
Both Lena and Lillian have mentioned the more famous member of the family, but ‘Luthors’ introduces a young Lex Luthor on Supergirl in an opening flashback sequence to the night a young Lena was brought to live with them by the patriarch, Lionel. However, as Lillian reveals to her adoptive daughter later in the episode, Lena is actually a Luthor by blood since she’s Lionel’s daughter by way of an affair with another woman. The affair, Lena’s later adoption when her birth mother died, and Lionel’s guilt over the ordeal was what caused Lillian to distance herself from the girl. But, Lillian contends she still loves Lena – and they must stick together as “the only two Luthors left.”