Korra, angered by her Parents's decision to keep the Truth about Cassandra from Korra.
hour earlier..
Korra came into the room where Senna was sitting.
Korra: "Mom?" Senna: "yes, Korra?" Korra: "Dad told me that I should talk to you."
Senna: "yes, of course. about what?" Korra: "about Cassandra."
Senna: "oh.. well, take a seat next to me honey. I think you should know the truth. it's time for you to know now." Korra: "what are you talking about?"
Senna: "Korra.. Cassandra is your Sister. her true memory about us is lost. when we saw her all grown up yesterday, we couldn't believe it. she was finally back home. and all along, she has been with her older sister, you." Korra: "WHAT?! Cassandra's my younger sister? but she told us that she was from other world"
Senna: "yes, the one you told us. but the reality is, her memory about us is lost. you see, about seven years ago, after you were born, we had her right after in secret.. when you left to train for your bending skills at southern compound. then one night... she was kidnapped, taken from us. we did't want to tell you or worry you about her. we wanted so badly to tell you but we can't. i'm so sorry sweetie" Korra: "how could you.. WHY did't you tell me the truth when we arrived?!"
Senna: "i'm so sorry! I was afraid.. we were." Korra: "so, she's really my sister?" Senna: "yes, Korra. she is." Korra: "i'll go and talk to her. i'll keep eye on her for you guys, Mom" Senna: "thank you very much Korra"