Thank you all so much for your replies! I definitely have been re-evaluating what benefit I will get out of keeping my ties with these family members, and what kind of bounds to draw. As always I really appreciate reminders that I am not alone in making these choices like StreetCarBlanche mentions. Like OpenEyes discusses I agree that A is overall a much more civil person than B, so if B is going to become more invasive in the long run A is going to be a healthier relationship to keep. I have already noticed these subtle cues with the last few get-togethers I have had with these family members.