Cinderella's Sister Episode 17

Hyo-sun comes home in a daze and tells Eun-jo, “Mom ran away.” With her initial anger now replaced by little-lost-girl fear, Hyo-sun says dully that Mom ran away because she felt sorry to Dae-sung. Eun-jo looks at her in a mix of pity and disbelief, like she can’t decide whether Hyo-sun is that good or that stupid. Hyo-sun admits that she had used Jang ajusshi as a reason to hold onto Mom — that she didn’t want to kick her out, so if she could forgive Jang ajusshi, she wouldn’t have to.

Hyo-sun asks who Eun-jo and her mother are to her that she’s like this, but Eun-jo has no idea and asks the same thing back: “Who are we that you can’t let us go?” Hyo-sun counters by asking who’s acting more absurdly, her or Kang-sook. Touché, although frankly I think everyone in this drama is operating on some absurdity clause.

Eun-jo can’t take this — she and her mother have incurred so many sins against Hyo-sun and her father that she can’t stand it. She asks Hyo-sun to kick her away, but Hyo-sun refuses. If you feel that bad, you could try for some self-kicking, you know. You could ask Ki-hoon for tips.

While Eun-jo walks a glum Jun-su to kindergarten, telling him that Mom will be back soon. He isn’t satisfied with that answer and demands to know if she knows who SNSD is, or T-ara, or U-Kiss. He does some of their age-inappropriate dances — pelvic thrusting and all — and is annoyed that Eun-jo has no idea what he’s talking about. "Mom knew them all said Jung Soo."

The daughter of Kang Sook's old friend silently cried. So Kang-sook takes the girl outside to get away from the ruckus, and it’s a little jarring to see her showing compassion for a random daughter when she has left her own. But this supports the point that Kang-sook has finally seen the error of her ways and while she can’t comfort the children she has wronged, she can comfort this one.

Eun-jo tells Jun-su that she’ll learn the dance for him for his kindergarten class. Jun-su yells that he wants Hyo-sun to take him instead of his ugly older sister.

So Eun Jo comes upon Ki Hoon's office and tell that she's going to use the computer. So then Ki Hoon leave the room. Then Eun Jo start to practicing the T'ara move but she don't know that Ki Hoon is watching her.

He calls out to her, “Eun-jo ya,” and gestures her closer. She thinks he’s crazy — has he forgotten all the angst between them? (And I’m like, honey, we’re all trying to forget that!)

She thinks, “He’s smiling. He’s definitely crazy.” But then she starts to head toward him, thinking, “And I’m definitely crazy, too.”