my brother is being diddled and nobody will do anything.

r/

i’m 14 and my brother is 9. we live with my grandmother, he is adopted and she has guardianship over me.
this started about 3 years ago with just subtle things like him grabbing my butt. but in the past 6 months it’s gotten horrible, if he’s told no or diciplined in anyway he goes on a sexual rampage. litteraly trying to feel me up, moaning, grabbing my boobs, or trying to touch my privates. i’m always clothed but it’s still nasty. masturbating in front of me or grandma, but he even does this unprovoked aswell. i’ve gotten cps here 6 times already, he told me himself someone touched him but when the cps lady asked he said he wasn’t. cps hasn’t done anything and my grandma doesn’t belive me that it’s my other brother anymore because my aunt and uncle convinced her it wasn’t through lies.(13m) they lied to her before when she brought it up and i let her know they were lying because they said they never let them alone without him or her present when i’ve BEEN their in the room with them and they were aloud to have the door shut and locked with nobody even checking in. so im 100% sure that’s where it’s happening and it’s him doing it. i feel horrible because he is my irish twin, but even worse that he’s doing this to my younger brother. everyone told me the last time i posted about on about this on a separate account to call cps or the cops and i have, but my grandma just lies and makes me out to be a bad person who lies and is “mentally unstable” (i have anxiety, but it’s only ever serious from HER actions so i don’t take the meds because for some reason it makes my heart race and feel so so shitty.) so i’m at my wits end and have no idea what to even do anymore. she is still letting him go to my aunts house alone without her even being present but i can’t go with because 13m brother makes me so uncomfortable and also with what i know about how they even came into custody of 13m brother makes me discgusted. they kidnapped him from my mom and somehow still ended up with custody because my mom was just recently quitting drugs when he was under a year old making her look like a really bad parent in court. EVERYONE i’ve told has done nothing or just not believe me. my grandmother also has some strong ties to dfs, which i think might actually be who comes everytime but i have no clue cuz as i said im 14 i dont know these things. all i know is my mom always complains about how dfs took her children while she was in the hospital which is 100% true, my little sister was taken and adopts out for litteraly no reason. my siblings before her she was on drugs when they were born so i can understand but she was completely clean for the brother i live with now who also suffered the same fate of being taken in the hospital right after birth, she didnt even get 12 hours with any of them. location: missouri