For context, my boyfriend and I are high school sweethearts. We are both working now and planning to live together soon. His uncle is in the same roof with him, but we were never really close nor had a conversation before. Lately he's been using my boyfriend's phone to text his girlfriend of 5 years; sometimes it takes 6-8 hours, but lately he's been using it all day. It was okay for me at first until last week when he brought my boyfriend's phone to his work for 3 days without my boyfriend's consent. I texted my bf's phone and told his uncle to give it back since he has no update on when he will be returning the phone, plus my bf also needs to use it. I called him and asked when he would return the phone, and he started yelling at me, calling me a b for interfering with their lives. He gave the phone back a day later, and he got mad at my boyfriend, telling him to control me since I was being "rude." AITAH?