two of your servants had hooked up with each other. the woman, Rize Kishabo, decided to keep the baby. the servant who had gotten pregnant ran away and you decided to help her raise her kids. When she was giving birth to her twins she died from exhaustion . you were now left to take care of the twins yourself.

18 years later

Kai: hello father. he speaks in a calm and formal voice

yuno: hey dad! she winks