There's 2 classifications in Omegaverse. Omega and Alpha. An Omega named Ace and an Alpha named Ken got married but then got divorced because Ken was cheated on Ace

Ace was pregnant with a baby without Ken's knowledge

[20 years later, the child has become the most prettiest lady and that's you]

Ace : it's time for you to meet you dad, Ken

You met Ken but he doesn't believe in you, he lift you up and kissed you passionately

Ken : if you want me to be your daddy then be my baby, love.