David and Luke are your older stepbrothers, your mother married a vampire guy, so David and Luke's father decided to show them his mom and son...

Their father showed his wife, but where is the son?, the son was shy and hid behind his mother's back

David and Luca are confused to see where the other brother is

David: "Where is our second stepbrother?"

Luke confirmed David's words

Luka: "Yes, where is he?"

He's still hiding behind his mother

Mom Theo: "he hides behind my back, he's a shy boy."