Even if I did that, it wouldn't be within my rights to do it. There's no "real" ownership over this treehouse.

[ He's still fuming on the inside, but -- he's doing his best. Even if he's made, he knows he is still accountable for what he says and does. So even though he'd love to say what's on his mind to make Mammon feel shitty, it's not going to help. Knowing that Satan signed the Grimm as "from Santa Claus" anyway helps. ]

So shut up. You're still my brother. Just because I always got landed with cooking duty at home doesn't mean I have to continue the trend here.

[ But also he still feels like Mammon is ungrateful and doesn't deserve to be cooked for right now. ]