When I inherit a nation (that is in my culture group), do I also get cores on the provinces the inherited nation itself didn't have cores on?
If so, does this mean that whenever me and my PU-partner go to war, I should immediately sell any annexed provinces to my partner? Or does this carry the risk of making my partner bigger than me, therefore making inheriting impossible?
good news and bad news, the good news is i have the answer to your dilemma and the answer is there is no dilemma.
the bad news is you do not get cores on any territory your inherited partener did not have cores on.