My Children's Alpha King Dad

Because of her stepsister Lily's plot, Miranda accidentally spent the night with a stranger.
Afterwards, Miranda found herself pregnant. But her baby was taken by Lily.
6 years later, she's the mysterious Healer, returning to the pack with her kids for revenge.
But the AlphaKing drags her to the registry office.
Her: You have the wrong person!
Him: You thought you could run away again like that morning?
Just then, the kids appear.
Him: "And you stole two other kids from me?!"