My college best friend's wife had just found out that he had been cheating on her, and she was determined to get back at him for what he had done. She came over to my place, telling me that she wanted my help planning a surprise birthday party for him. But as soon as she arrived, I could tell that she had something else on her mind. She started rubbing my legs and giving me those "fuck me" eyes that I had only ever dreamed of. I could feel the sexual tension building between us, and I knew that I couldn't resist her any longer. She excused herself to the bathroom, and when she came out, she was wearing nothing but a bra and panties. Her big natural tits looked even more delicious than I had imagined, and I couldn't help but stare. We had always had a secret attraction towards each other, but we had never acted on it. But today, all bets were off. She knew exactly what she wanted to do, and I was more than happy to oblige. She crawled onto my lap, her pussy already wet and creamy with desire. I couldn't resist any longer. I wrapped my arms around her and pulled her close, our lips meeting in a passionate kiss. As we tore each other's clothes off, I couldn't believe how lucky I was. This was the most passionate sex I had had in a long time, and I knew that I would never forget it. We moaned and screamed in pleasure as we fucked each other, our bodies moving in perfect sync. I felt my load building up, ready to explode inside of her. As I filled her up with my cum, she moaned and whimpered, her pussy clenching around me. We both knew that we had crossed a line, but we didn't care. This was the most satisfying sex we had ever had, and we both knew it. I felt a little bad for my friend, but damn, that pussy was worth it.