Hi 36, I'm so sorry you find yourself here and yet, sadly, you find yourself amongst a very large number of people that are walking your walk.
I'm also deeply sorry you and your wife lost a child. You've officially entered two lousy clubs no one wants to find themselves in and to say this betrayal is the worst thing you've went through is testimony to how deep these wounds go.
I can't disagree with anything the posters have said to date - yup, the story is real bad - is she remorseful? No, doesn't sound like it - should you be protecting yourself financially? Yes - getting tested for STD's? Yes.
My husband drained a 401k account for his A partner after she extorted him for abortion money. Shortly after my Dday, he met her for lunches and gave her another $3,000 because as he put it: "She was in a real bad place." Apparently, she was committing credit card fraud and had also embezzled $20K from her previous employer. Meanwhile, I was home, caring for our 4 year old who was headed into surgery. I was barely making it through the day, but she was in a real bad place.
Had we had a dual signature form on those 401K's he would have had to come to me, but we didn't. I'll never make that mistake again, but I trusted him and in no way could have imagined the nightmare I was entering into.
Yes, your wife sounds like she's in a fog. We all hurt. We all suffer. It doesn't excuse behavior, but we're all operating at different levels of emotional intelligence.
The day I found out about H's A, I asked him how many women has he be f*&^ing. His response: "How many did I f*&^ or how many did I want to f*&^? That was almost 3 years ago. We're still together.
We're not together because he was the poster child of remorse; although, he is now. It took a year to dig through his TT. He did start IC right away and even with that, it was quite a while before he came out of the fog.
I also didn't find this site right away and was in my own trauma fog hell of my own, so I didn't really know what to do or what measures to take. It took me 6 months before I had counseling, legal advice or STD tests and in that, you're ahead of the game.
I stuck it out because somewhere inside I truly believed my husband was a good man who made some horrible choices. That doesn't mean we still don't have horrible days over what happened or that on some days the whole world seems to be a trigger for me, but I did stay in the game.
The two of you have been together for a lifetime. You've had children together and have buried children together. Only you can make the choice to stay or leave and in the meantime, you are taking the right and correct measures to protect yourself.
I'll also let you know that you'll be in this pain for a long time. This type of trauma is not for the faint of heart. It's course is long and the pain is deep. It's easy to become bitter, but if you can work, even the smallest bit, at aligning yourself to your highest light and love, I promise you an indestructibility will be born inside of you that is solid and true with even more love and compassion. I know that feels hard to believe right now.
36, hang in there and take it day by day. Also, get some rest. Take great care right now.