I wouldn't say a single word to her, wouldnt show her any evidence, wouldnt give her the time of day, I wouldnt even bother looking in her direction. Ignore her; be gone from your home as much as you can. Pack up her belongings and put them in the room with the computer. Hell. Toss them out the window with the computer.
If she wants to play with her kitty in front of a computer go out and find out how a real cat toy plays. Start dating a Hooter's Girl.
Tell all your mutual friends you are getting a divorce that you want nothing to do with her and you have never been happier in your life now that she is out of it.
Oh yeah. and smile all the time.
You will be amazed at how fast she loses interest in her internet fantasy when her world comes crashing down around her.
