when will they find out that katherine is in elena's body
No Exit (The Vampire Diaries) Katherine (Nina Dobrev), still pretending to be Elena, tries to get closer to Stefan (Paul Wesley) so they can be back together. When Caroline (Candice Accola) arrives and tells them about Damon, Stefan wants to find him and Katherine offers to go with him. Caroline warns him that it is weird for him to be so close to "Elena" after everything that happened but he reassures her that they are just friends. Before Stefan and Katherine go, Caroline gets a phone call from Tyler (Michael Trevino) who tells her that he worries about Matt (Zach Roerig), who is vanished for two days, and that Nadia (Olga Fonda) was compelling him. Katherine hears Caroline's conversation with Tyler and she calls Nadia to ask if everything is fine. When Nadia tells her that Matt found out that she is not Elena, Katherine asks her to kill him. Caroline leaves to go to Tyler's while Katherine and Stefan leave to find Damon.
Elena Gilbert After Elena became a vampire, she became sired to Damon and they slept together. According to Plec during an interview with TVLine, Elena "really believes what she feels is 100 percent genuine and real", and the couple "wants to be together and realizes that they shouldnâ€™t, yet really wants to. So what do they do?"[14] Stefan became heartbroken, feeling angry and betrayed, and lashed out at Damon and Elena.[15] In the season 4 finale, an unsired Elena confirms that she is in love with Damon, and the two kiss passionately. At the end of season 6, the two plan to become human, get married, and have children together, but their dream is abruptly compromised by Kai, who puts Elena into a magical coma. Damon remains entirely devoted to Elena throughout the remaining two seasons as Elena sleeps peacefully. In the season 8 finale, she is revealed to be happily married to Damon.