This shaving red flag reminds me of a previous poster... SpaceGhost0007... whose wife did the same thing. He said he had always liked having "a little grass on the playground". Pluse, he had noticed some lingerie drying that he had never seen before.
At this point he already had a private investigator's report of her cheating with her boss whenever he would leave town on business. He already had the evidence. So, when he confronted her he asked her about the shaving. He told her that she knew that he didn't like it, and she had always said she did not like it because it made her itch. So, he said that if she did not do it for him, and she did not do it for herself, then who did she do it for? That is when she started crying, etc.
To my way of thinking this shaving is a really large red flag, but in and of itself means nothing. You need more if you are going to hang your marriage on this.
You need to chill out and observe her going forward. You have received numerous excellent suggestions. You need to develop some impulse control and not confront when you may or may not have any evidence. When you first posted several posters told you to keep your mouth shut and your ears and eyes open. Just quietly collect evidence.
The 180 is designed to help you control your impulses, as it helps you gain some space and hopefully clarify your thinking. If she is actually actively having an affair, no amount of talking will help at this stage until she pulls her head out of her behind.
One thing about the 180. It is not designed to punish or try to get her to chase after you instead of her AP. It tells you to be pleasant when you speak with her. I have used the example in the past of you walking down the street and a stranger comes up to you looking confused and asks you for directions. You would not be rude or snippy. You would calmly tell them what they want to know and then go on your way. That is the way to interact with your wife. There are 33 points to the hard 180. Not one point tells you to be mean, etc. The points tell you to be pleasant and cheerful. Act as if you are moving on with your life with or without her. She can join you if she wishes.
Good luck.
[This message edited by lrpprl at 7:29 PM, Sunday, October 20th]