Alright so my SO and I are in a big argument. We have been babysitting his 9 year old brother who acts like a 2 year old. Well yesterday my SO was in a grumpy mood and his brother was here playing on the computer in our dining room. Our daughter (16months) has access to the living room and dining room to play so she kept going over to his brother and saying hi and stuff. well his brother kept saying that our daughter was doing all this stuff she isn't supposed to do like pressing buttons on the keyboard and messing with the computer stuff. my SO kept getting mad and yelling at her and punishing her. Our daughter rarely gets into things she isn't supposed to. so I sat where I could see her but where his brother couldn't tell I was watching and He yelled "Lilia stop pressing buttons!" and our daughter was standing next to his chair playing with her toy not even paying attention to the keyboard or even in reach of it. so I knew that he was just saying things to get our daughter in trouble. my SO got up to yell at her and I flipped. I made his brother get off the computer and sit on the couch for the next 40 minutes before his mom got there. he threw the biggest temper tantrum and was screaming and crying. my SO doesn't believe me that his brother was making it up even tho I saw it with my own two eyes. Our daughter was yelled at and punished multiple times for stuff she wasn't even doing and that makes me feel horrible. my SO keeps saying I was wrong to make his brother get off the computer and sit. idk what to do anymore.