DCD mentioned talking to his lawyer...

[Isawitfirst]

Personally....I would take it as a veiled warning that he is throwing it in there several times that this was not a "family friend" but a "Lawyer friend".

It's almost like he's trying to also flex muscles and show he has some power or that he is watching you. I would take it like a intimidation tactic....but that's just me.

It's like parents who mention several times their 'police' connections as if that should scare us straight in some way

I agree but far more strongly. Nothing veiled about this. He is threatening you using a passive-aggressive tone. I would not take on the little sister. Any little thing and I would be wondering about the "lawyer friend" hanging in the wings. You are being bullied. And yes same house could mean same aggressive play learned from the big brother. Why not mention his engineer friend or his teacher friend? I would terminate asap and even mention that you took the lawyer friend comment as a threat and could not work with them as a result. Maybe he would remember and not do it to the next provider.