Fireplace Man, I am going to lay this out for you very clearly and bluntly... and I wish it weren't the case... but I am really starting to think that she is involved with another guy. And every single day that goes by that you do not have that keylogger installed on the computer, you are wasting precious time of gathering crucial evidence of her cheating. Let me point out to your attention the red flags from your very own words...
Came home last night around 11:30 PM. When I pulled up the street into the driveway, I could see that my wife was back in the computer room.
By the time I pulled into the garage and got into the house, evetything was dark and she was upstairs. I went up, and she was in bed, lights off acting like she was sleeping.
There is absolutely no reason to to act this suspicious unless she had something to hide from you. Now she's avoiding you completely. If she's having an affair, it is now escalating big time. You better start gathering evidence NOW. You don't have a leg to stand on without evidence, and confronting her on your suspicions will yield no truth for you as you've already tried this and failed.
This morning, she was in shower and out of house (I assume to work) by 6:30 AM, I know she starts around 8:30 AM so this is an hour and a half earlier than usual.
Great observation here... seems to me like plenty of time for a quick early-morning rendezvous with the OM. And since now that she's pissed off at your prior questioning, she's probably actively trying to pursue this affair to the highest degree since her emotions are running wild. So what are you going to do about it? Sit around and keep wondering or get that freakin' keylogger installed to gather your proof?
One thing I do know as I looked out the window as she was getting in her car, she was dressed to kill.... Unless they have an early meeting at work...
Nope... I highly doubt any meetings at work start an hour and a half ahead of schedule. She's dressed to kill because she is going to meet the OM for an early morning rendezvous. And now that she's pissed at you she's probably venting her anger by using the OM as her sex outlet. This situation is becoming dire. You may need to find a way to follow her if you can't get a keylogger installed soon. Heck, you should consider it anyway at this stage of concern. HUGE RED FLAG.
Go to sourceforge.net - It is an open source site full of freeware and they have keyloggers you can download and install. At least then you don't have to waste any more time running out and buying one, you can try your luck with a freebie.