It's your father's

"I-It's your father's." Sae-byeok told you she was carrying your father's child. Your half brother or sister was growing bigger in her belly.

You felt disappointed but it was always the likely outcome because your father had sex with her first and repeatedly came inside her.

You also felt disgust at the thought of her giving birth to your father's baby. Your father is a middle aged man still he impregnated a girl young enough to his daughter. He will be a father again despite having an adult son.

Sae-byeok lowered her eyes, "your father always planned for me to have his baby. One of the stipulations in our marriage arrangement was I would give him children."

Her words made you angry and you weren't sure if you could see her in the same way while your father's baby grew bigger in her belly.