I walk in on my wife cheating with our neighbor and choose to leave her to avoid getting her pregnant

I had my suspicions about my wife's affair with our neighbor, but it wasn't until I walked in on them in the act that I was sure. Seeing her bent over, taking his pounding, was a sight I wish I never saw. But rather than confronting her, I chose to leave her to her sordid ways. I knew that if I stayed, I might be tempted to join in, and I didn't want to risk adding to her pregnancy. Watching her get fucked by another man was enough to satisfy my lust. I decided to focus on my own pleasure, ignoring the pain of betrayal. I took care of myself, making a mess in the process, while she continued her tryst. It was a hard lesson to learn, but I knew that some things were better left alone. I walked away, leaving her to her neighbor, hoping that she would eventually come to her senses.