Serena later meets Luka Dokich (Keelan O'Heir) and becomes immediately attracted to him, much to the horror of her grandmother Svetlanka Ristic (Deidre Rubenstein), who knows the truth about Luka's true parentage. After Luka donates part of his liver to save Liljana, it soon emerges that he is her son and Serena's half-brother. After planning the school formal with Boyd Hoyland (Kyal Marsh), Sky's boyfriend, who has separated from her, Serena shares a kiss with him and they begin a brief relationship.