I have suceeded in exchanging one of my eastern region with Brutti (Me playing as Jullius) for a region in the north east. Part of my imperial plan to dominate the north eastern area.

They agreed in exchanging the land in additional of me topping up 20000 monies. I accepted and the transaction is done.

However, to my horror in the next turn, the senate demanded that I return the land to Brutti.... What the shit!!!

Is there anybody out there to advice on these? I would really want to keep the land in the north east region.

Is there anyway to occupied allies land but still retaining the allied relationship?

Thanks in advance.