Grabuto138
First Post
That just seems crazy to me. Unless I as the DM actually wanted such a connection to exist (and if I did I would actually check with you first before making such and in game proclaimation). How do you know this NPC is really who he claims to be and not another soldier or creature or assasin or spy etc etc. Now as the DM I have pull you aside and say um dude thats a problem your uncle didn't know him. Now I have the tell the group you're mistaken and have effectivle flagged to the entire group that something is up with this guy.
Furthermore where does the madness stop can you suddenly proclaim you're are the nephew of the mayor since the party is headed to meet him to talk about a job? Can you spontaniously decide you are the brother of the archmage who rules the local magic guild when you want to buy components or apply for membership?
No thanks glad it works for your group though...
A lot of it depends on your improv skills and your relationship with your players. My group has been together along time and no one would intentionally undermine the DM. When a player throws out a new piece of world-building it is assumed that it serves the game. The DM can also just make an off-colored comment, gently mock the player, and drive on if it is conflicts with the narrative. But in general our DMs -including me- will make a decided effort to make it fit the narrative.
Edit: Assuming you are in good relations with your players, and it is understood that players can add to the narrative, you don't have to pull anyone aside. You just shake your head and say, "I don't think so dude. Hand me the Pepsi."