Sarcastic answer...

Mark's POV:

I guess it is John because he is the only person left in this family photo...

I got angry when I realise it is John...

I can understand Alex don't know anything about the criminal acts done by his father and brother, that's the reason he is still including them in his family photo. But they don't deserve in his family sketch if Alex knows about their reality he will definitely hate them...

Alex: How's it, Mark?

(My thoughts are distracted with Alex question I nodded my head as ok and pulled him close to me and made him sit on my thighs.)

Mark: So do you like your brother?

Alex: No...

Mark: Why?

Alex: Because he always pinches me and makes me cry...

Mark: Then why are you drawing your brother in your family sketch?

Alex: He is not my brother...

Mark: Then?

Alex: He is my brother in law...

Mark: What?