After the death of their older sister and brother-in-law, Jenna and Sienna Sommers are left too take care of their niece and nephew Elena and Jeremy Gilbert however Sienna is still trying to figure out who she wants to be in the world however she knows her sister can't handle them both on her own so she decides taking a break from her private school life to help her sister is the best thing to do for now. (Stefan Salvatore xoc season 1-6)