Your wife most likely wanted to see what you were saying about her and your relationship situation. There are times when the spouse will come here and yes, other forums as well, to see what we discuss here and more importantly to see what their spouses are saying and what the advice being given. By doing so, it gave her an advantage to stay several steps ahead of you and she just might have printed everything off and kept it in a safe place to show her lawyer, if it became necessary.
No one truly knows why they come here, but I can certainly put my money on what Cadet stated about gaining an advantage in her divorce.
It is very important that posters do not come here or on other forums and share a lot of what is going on. If they do, they will need to figure out a way to change up some of the info so that spouses do not recognize what is being posted. These forums are open to the public and people do not need to log on as users in order to view the community boards and read what is posted. This also applies to many of the other internet forums out in the cyber world.
In your case, the key logger had you pegged dead to rights and she was able to follow you wherever you went. I'm sorry this happened and hopefully she got what she came for is now history on this forum.