I think most have been said but it did make me curious
I am wondering if an eventual plot point would involve the Coil plot with Louisoix and Fourchenault. Especially if the twins weren't supposed to tell anyone. But who knows, since he's family? Speculating that they may have not said anything but word reached him/had eyes on them anyways?
Could it also be related to them being disowned? (like I said speculation if they didn't really bury the hatchet on that plot point of Grandpa being a primal)