Responses
I don't think so, from the first place his goal was to know the real reason behind their visit in his kingdom and he got the secret of the twin family out of it. now he knows the secret having also the same blood as them if he master controlling his mana and then time will come he can do bestowal magic and can go back and forth from his original world to get marbles you know.
I dont think he's smart enough considering he is jusy giving other world thing easily...
That wine compare to that infomation was not a good deal, considering that he can get that info Easily from/by the agreement they have... No need for that talk