My brother is masturbating, I can hear him and I'm getting aroused.
For many, this might be inconceivable, but the truth is I couldn't resist the urge to fuck my brother. I was in my room, masturbating. My mind was on my boyfriend's penis because I wanted to fuck him. But suddenly, I realized my brother was moaning, meaning he was masturbating too. That sound excited me more and more, and although I never thought I could do this, I ended up inviting my brother over for sex. My body was hot, and I didn't seem entirely sane. I was aroused and wanted to feel my brother's penis going in and out of my vagina. Honestly, feeling my brother's penis was an incredible feeling, and I wanted him to penetrate me more and more roughly.