You're not dealing with the woman that once loved you and cared for you, you're dealing with a different person but you keep thinking that you're dealing with the same wife, you're not - she's a different woman right now.
Agreed.
Her homework from personal counseling is to go out and do all those things that she has wanted to over the past few years during the next three weeks.
Your input is dead on the money. She isn't (or wasn't) the person you painted her out to be but in the end, she will be an adulterer.
The question is, can I stand to support someone who once loved me while she follows through on her selfish desires while living under the same rook with my son and I?
Time will tell.
Why is that question even being asked? You don't have to support her and what she is doing. Why would you?
You can be happy for yourself and ... YES I'm going to say it, start socially interacting with other women (dating) but you don't need to tell your wife about it, in fact if you do, it looks like you're doing it to make her jealous and that looks lame.
Move on with your life and start seeing, dating other women - watch what happens to your current situation when you start doing what works.
Hanging in there and allowing her to sow her wild oats at your expense definitely won't work LOL!