JuliaGoddess - My stepbrother blackmailed me and I had anal sex with him

I got home from the gym and my brother was staring at me like he knew something I did wrong, I had even forgotten what I had done and then I asked him as if nothing had happened what he was staring at me for and he told me he knew what I had done and that he was going to tell our parents, I remembered and got really mad at him, I asked him not to tell, and he said he wouldn't tell but on one condition, if he fucked my ass, I got really mad and cursed him a lot because he was my brother and we couldn't do that... and at the same time he couldn't tell my parents what I did, omg I had to give in!