Me 67 BH, she 60 WW, EA in 2007, R, and I just discovered (an inactive?) PA in 2017. I am monitoring her communications and will decide accordingly if to move out.
I want to tell my whole story and ask what is best to do. Writing it will be therapeutic for me. I will give lots of details, I know that basically all affairs are the same, but I still need to tell you everything. My wife is still somewhat of a mystery to me 
M in 1984, she 24, me 30. We were in a meditating community. I was a teacher and older. In a position of leadership, a take-charge guy. She had low self-esteem, though good-looking. Her two (much) older sisters had ignored, and ostracized her as a child, maybe from jealousy. Her father was old-school 'master of the house'. Her mother never handled money, she was a very sweet stay-at-home mom. WW has a categorizes some people as:  'Strong' its important to her. I guess I was Strong at first, but not now. She Liked the protection she had from being with me. I Helped her become a teacher, gain status. We 2 worked together,  became a power couple in the community. After 9 years the boys arrived. 
In 1999 she then became disillusioned with our community (due to internal conflicts). And also began suffering from RA. We also had less sex, and she became more critical of me and the community where I was trying to build a big new project. I just found out now, that back in 1997 she had gone unbeknown to me,  to her HS boy friends' wedding (he was her first sex partner) without telling me about it.
She pushed for us to go abroad to another community, for the boys' schooling. So in 2001, we did.  She became somewhat incapacitated due to her RA attacks. I was trying to provide for us, she was dealing with our elementary school boys. We had 3 bad financial years till I got on my feet financially. To make it, I became a consultant, basically, a road warrior traveling from M-F. That helped us get on our financial feet.
I tried to make sure we had sex on weekends. Feeling it was an important bond. But she said it hurt her,  and she did not welcome it. When we did, she was passive. Sometimes she cried...  I tried to suggest non-penetration sex, But she had no interest in other forms of sex... was conservative, shy.
IN 2005 She tells me of a great spiritual guy. She met him at a seminar and has had long-distance talks with him about life and getting the drama we had gone through with our community in a spiritual perspective  ( later I found out he was probably grooming her and had wrecked several marriages). Then he moved to our town and we all meet because she wants us to be friends. Afterward, I tell her I don't like the attention he gives her (and her vibe). I told her I didn't want her to see him,  or be in touch with him. BTW at this time, I was already a road warrior and only came home on weekends.
She had gotten herself a private email .. something we did not have before (this was in 2005 before social media, etc). One day in 2007  I arrive home and find the computer with her open email on our family computer. She and this OP guy I had asked her not to meet, were planning how to meet at a church concert. And since I was home for the weekend, they were discussed how to hide it. She wrote him: 'you are my soul mate, if we will not join in this life, then we'll meet in the next lifetime....'
I called her outside, (the boys were home) and told her what I had seen. She lies, makes excuses, etc, and runs back into the house and erases the emails.
So I invited a mutual friend (as a witness and to spread the news) and that OP to our home that very in the evening using some excuse. I confronted them, asking them that since they seem in love,  does he want to marry her?  take care of her illness?  support her? They hem and haw, and look at each other, and do not give a clear answer.
I feel the outsider.
As he walks out,  I tell him that since he is not taking responsibility for her, there will be no more contact, otherwise he will have me to contend with. Physically.
She said it had been a 2-year thing. It morphed from 'wise old man (he was 10 years older than me, white-haired) to being in love like in high school. She said she had learned many important things from him. He also somehow reminded her of her father.
That they had 'just kissed' and went for long daily walks, holding hands in the park, she coming to the walk with our dog. They would end up sometimes at his place and make out on the coach at his place. She said he was not able to 'do it' due to an physical problem with his genitals. However in making out she had felt it through the cloths semi-erect. She vehemently held that it was just emotional, not physical. Also she said I had ignored her, and she had felt that our marriage was dead. So she felt it was not much of a betrayal.
At the same time she said that after a few months of becoming somewhat physical hugging kissing etc, she started feeling conflicted, and had wanted to end it. She also said he was the last person she would want to live with. She just liked the talks and perspectives on life. And it  was just a sort of teenage infatuation. He was not marriage material and that she knew very well he was not dependable or straight. In their emails and I saw  many passages where she is telling him how great and successful and wonderful I am. And in our talks this also came up. I read Bob Huizenga's books and courses. He categorized her as the type that has an emotional type: low self-esteem, a strong father figure.  likely to have just one affair.  
[Well 10 years later she had another affair. A PA this time. Go figure.]
So we did a sort of reset. I suggested we do her dream of getting a second degree , and we relocate. I helped her get admitted and we moved two states over. The talks continued, but after a while she was not as open and said we should not re-pen things. For the first few months I tracked her mails. They kept in touch, she wrote him how she had to stop, that i was on to her. She was sorry. Etc.  confronted her, demanded a message I edited to tell him no more contact, unfriended him, closed her private email, etc. and it petered out.
 
We were in a sort of R. But I think she was also scared of being caught, losing her status and marriage. And she liked college and the status of a master's degree. So Life went on. 
We had 4 nice years. Her in college and me building my business. We did have sex. Maybe she did not initiate, but she was available/compliant. We seemed on the right track.
In 2011 when she graduated, we returned back to our home country. My business had more financial success. Her RA got under control. We got a nice house. The boys were in HS or grown-up, life seemed on track.
From 2007 we had seen 2-3 therapists. She some for 1-2 years, both of us saw some others for short periods. Later back in our home country, she again saw several therapists, and she always wanted me to 'work' on changing myself to improve the marriage.  We also went to 2  couples therapists. So about 2017 while we are doing the last couple therapy, I later found out that she had reached out to a former HS sweetheart (and first sexual partner. Who she had gone to his wedding without me, in 1997), and met him for a talk and a to catch up, and then a few weeks later, met him and had sex. Later, in a private session (I did not know about the PA then) I asked the therapist if we could fix the marriage if my wife actually wanted me? Her answer was a careful 'maybe better to split up.
She says I snore so for the last your or so, we cannot sleep together, but she never comes for a goodnight hug. However, on some cold nights, we do sleep together. And sometimes there are hugs and cuddles (no kisses) and she seems to like being warmed, cuddled, but puts boundaries. Sometimes she comes home from her clinic (it started taking off) and gives me a whole-body hug.  Over these last years, she has become very critical of me. Even In front of the boys. She belittles my successes. Asks for business advice about her clinic, but always rejects it. Outside she hugs me, puts on a show we are a great couple... This was in contrast to our early years were I was dominant. For a while I decided to go with it, and let her run things, we did it mostly her way. I let her fun finances, make decisions, saw if it improved things. 
She seemed to become more domineering, up to a point where she yelled, trashed and even one time threatened she would hit me (which do to my size and background is a joke). I see her as not brave enough to pull the plug, but it seems she does not feel she owes me much more than household stuff, medical treatments, and managing our joint finances (i think fairly).  She wants to bitch about me, but also to enjoy family life, status, support. (Sometimes enjoy a romantic friend on the side). To have her cake and eat it too. 
For the last 15-20 years it seems she is fighting my father/control/ protecting figure to gain her independence. And she wants to keep that, as well as to continue to be the center of the family (she is a good mom, I think) and be appreciated and loved at home. The best of both worlds.
She has two personalities within her. She leans and trusts and depends on me. Agonizes if I do not tell her what to do or choose in some situations. Yet when I pick a stand or start a project – she is very critical and antagonistic. I call it that she is fighting (at age 60) her war of independence. 
But she can also be wonderful at times. And if it was a genuine R I would be happy to stay with her. And I do know our small family would slide if we D. Both boys do sometimes yell at her to get off my back. They know what's going on (but, I think, not the affairs, i think).
So just last month I changed course (After I found out about the PA) in 2017. I began confronting her. She waved D threats. Wanted us to sign a sort of prenup, agree on the division of property just in case...  So I  told her you'll get your half, fair and square. And I am past grieving for our marriage. Just write me a formal request to D  and we'll go it. Just take into account our standard of living will go down. She has threatened several times, but never written a letter. I also began stopping her when she started her trashing and criticism. She did diminish that kind of talk. Not totally. But I feel better. 
I year back I cashed some property to allow us trips etc. and got us an electric car on her birthday, with balloons, happy  birthday, etc. She hugged the boys, but not me, and since then she says it’s a present for me, not her. And that she does not trust it on long trips and won't go drive in it to a place (that is still within range), because 'she does not trust it'. She has demanded to buy a different car. My response – I will not go to that resort, or destination if we drive in a different car. 
Sex became occasional. Diminishing slowly over time, to close so zero today. Usually she said she was 'done with it', not interested, it hurts, etc. But we do sleep together and there are hugs, massages, etc.
It's interesting that in 2017 the therapist gave us an exercise to write up a secret. I wrote about the EA in 2007. She wrote about her HS boyfriend with the PA.  We were supposed to burn them. But I found then lying in a drawer 5 years later. It's possible she wanted them found. Just as with the EA she left the Emails open on the computer. 
Last month her homeopath who has treated her for years (and likely knows all her issues with me) treated me. I reported a dream that: we had parted, and I had fixed up a new place for me. The homeopath asked me how I felt. I said relieved. She then encouraged me to do it, get myself that place of my own. She actually pushed her professional boundaries in doing this. She went out on a limb to say that.
My perspective and feelings have changed. My focus has changed. For at least the last 20 years, I  was trying to fix the marriage, change, do R. Now I am fine both ways. Fix it or change.
After 38 years of being focused on pleasing and gaining her back, and never looking at another woman,  I actually flirted with 2 ladies. One returned the interest, the other not at all;).  It never happened before. I was focused on her. And now I choose to stand my ground, I don't allow her to trash me. I no longer see D.  or better, a separation (due to economics and the family reasons) as the end of the world. My backup plan is to move to a rental unit we own that is at the back of our house, but has a separate entrance. This is practical for walking the dog, seeing the boys, and keeping expenses down.
Moving out,  and then having the big discussion will make the point I am not worried of D. She may panic. and re-consider what she is losing. If she wanted back, I would go for it, if it’s the real thing. Full disclosure, a warm bed, etc. When it's good it can be  good. But it has not been so for a long time.
Right now I am tracking and figuring her true mindset, and looking to see if she and the HS boyfriend (or someone else) are still in contact. If it was a one-time thing and he/she  was not Interested to continue, or if it is ongoing. That kind of affair (ongoing, extended) would make it easy for me to bring things to a head. I hope in a week or two I will have the full picture, and make a decision.
This is a big step and I do not want to harm my life more than I have to.
I just cannot 'read' her or get inside her head. 
I know I seem blind and stupid, but hey, 
I can use all the help I can get.
That's it folks.
Happy to hear your insights ideas and feedback. 
Thanks for listening!
 [This message edited by Sun108 at 4:42 PM, Thursday, March 3rd]