My ds has been disrespectful to me for a while. He yells at me, throws things, hurts his little brother, and tells me things that I would tell him like, "One more word and I shut the computer down for the night." Lately though, he's beginning to disobey other adults, like backtalking my mom and actingf up at her house. His almost 2yo brother is mocking him as well as tearing things up, throwing food, and hurting the cats. I have no idea what to do since taking things away, putting them to bed, etc. doesn't work. Any advice?