Haha! I did the same with my aunt! I didn't know my aunt, and her partner (my other aunt, they had the civil union ceremony, and I consider her just as much my aunt) were a couple! My parents told me they were best friends. And I always would tell my friends that it was so cool, they were best friends and they lived together and did everything together!! HAHA! I guess it is hard to explain things to kids, so you have to come up with something!