"What are you saying, Appa? Eomma?" Suzy asked.
"What we're saying is that you two are not real sisters, one of you is not our daughter" Hyeko said.
"You're joking" Suzy said.
"No, we are not" Hyeko said. "It would be better if that was a joke" she said.
"No, it can't be true!" Suzy exclaimed.
"Suji-ah" Sihoo called.
"How did this happen?" Suzy asked, in verge of tears.
"12 years ago, when the two of you are born, you stayed in the nursery with the other babies" Hyeko started. "One day, the nurse who was taking in charge got confused with the names when two babies lost their tags and got it switched" she finished.
"We didn't knew until the nurse told us when she saw us again, 12 years later" Sihoo said.
"I am still not buying this!" Suzy said.

Unlike Suzy, Yoona was silent.

"Then, who is your real daughter, Eomma? Appa?" Yoona asked. She knows the answer already. It's her, she was the only one different among them.

The two looked at each other once again.

"I'm sorry, Yoona but our real daughter is Suji"

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Don't be a silent reader, chaebal!