As my stepmother use to say, "What do they know!" :-) It sounds like you're doing just great and I'm glad for you that they live far away so can't try to meddle more. I would think of them as "jealous" of you.

One of my good friends was child 7 of 8 when her family came on hard straights and a childless aunt wanted the two of them, she and her sister, #6. The last 3 children were much younger than the first 5 and the wealthy relatives were "offended" at so many children and tried doing that give-them-to-us-thing. Their mother made the same rude noise :-) and told them where to go with their idea.