My stepbrother calls his dad daddy and hes 15?

I called him gay because like he must be because who the hell does that. And he was all like "I'm not gay!!" and I was like "yes you are you. You kiss your dad you weirdo". Then he denied it when he definitely does. He called me a cam whore ***** when I have never got on web cam being a whore. My mom overheard and was all like "omg you've been showing your body on webcam" and I said nooo!! and he told her I've been talking to old men on Omegle. wtf!!!! Its lies!! Why does he want to ruin my life??!?! I hate him!!