I watch him pleasure his girlfriend while I masturbate to his performance

I was stuck at home with nothing to do, and my friend was out of town. So, I decided to invite his girlfriend over to kill some time. She was a hot babe with big, natural tits and a tight, Brazilian ass. I had been fantasizing about her for a long time, and now I finally had the chance to see her up close. My buddy was away at college, so I took the opportunity to watch her pleasure herself while I pleasured myself as well. It was a dirty, kinky sight, and I couldn't help but get turned on by it. Her big, natural tits bounced as she rode his big cock, her moans filling the room. I could see the pleasure on her face, and it only made me want to join in. As I continued to masturbate, I found myself lost in the moment, enjoying the sight of her big, Brazilian pussy getting fucked by my friend. It was a sight to behold, and I couldn't help but cum all over her big, beautiful ass.