I have this problem with my family too. I try to be empathetic, as until I got Tosca I was completely against dogs of every kind. I used to be deathly afraid of them as a child, and even as an adult I don't like them much. When we got her, everyone said YOU got a dog? But I have grown to love her a lot, although I am still not a fan of other dogs for some reason. I guess to me she is just not a "Dog", she is my pet
Anyway, my point is, my parents are like me, and while they tolerate Tosca, they don't really like having her over. When we first got her (in Feb) they were really good about taking her the first few months, and then over time they hinted they only wanted her if we had no other options. I try to be understanding, but its hard for me because I didn't like other dogs in my home becuase they smell, shed, pee in the house, etc. None of which my dog does. But my parents dont like having to "Basenji-proof" the house, which means putting everything up and closing off most of the house to her. I am never sure how to handle this either, and how far to push the issue of bringing her over. Luckily my parents have been pretty good about it so far, but we will see in the future. It definitely has caused some tension here and there though the last few months. I guess I don't really have some advice, I just wanted to let you know I go through similar problems with my family. Good luck and happy holidays!