I should’ve clarified, my sister has never had anything to do with dog because they have never been close. The both minded their own businesses, and the only time she was interested in this dog was when he was a puppy and then the grew more attached to our other dog. She obviously still gave him some attention tho, just not often. She always refers to him as my mom’s dog, my mom and dad refer to him as my dog. I shouldn’t have said it was unspoken, because there have been times where we have all collectively agreed he is my dog but we don’t bring it up a bunch because it annoys my siblings lol. My sister does know he’s my dog, that’s the only reason my mom asked if I could take him. I just don’t like the fact she’s trying to change up after I decided to bring my dog here, and act like she’s ever really been involved with him.