I had dinner last night with my second cousins (or first cousins once removed... I forget how it works.)
It was a delightful and relaxing evening spent with people I've known all my life, but who don't have an overly strong sense of (what's the word I want here... something that infers the kind of baggage a parent or even a sibling might bring to the table...)*runs off to consult thesaurus* -- vested interest seems to be the closest I can get. I hope you get the idea.
In any case, whatever words are used, it was much needed and much appreciated.