Is there ever a suitable reason for infidelity in a relationship?

Kryptonite, the emotional relationship I had with a woman online was not something I was looking for. I was not on the prowl, trying to find something on the side. But gradually, almost imperceptibly, the friendship became more than a friendship. You ask about guilt -- at the time, I did not feel guilt, because what we shared seemed so beautiful. It was only later on that we each came to see that it was wrong (and in all honesty, she was first.)She now says that we deluded ourselves, and I eventually had to admit she is right. At any rate, we are not in contact with each other anymore.

Perhaps the best answer to your very logical question is that these things defy logic sometimes :)