I'd do the poly as soon as you can. If your wife has never had an affair before this, and you know without even having to ask that she's had a lot of opportunities, then that means a lot in my opinion.
Then you know what you're dealing with and you move forward. This not knowing and waiting also can kill a marriage. If she has been faithful up until this recent affair, then I would not be all that worried that she will have another affair in the next few months. My observation is that about six months AFTER the crisis is over and stabilized, then she might if she is apt.
Serenity prayer. I'm usually about the opposite of that attitude, but when it comes to the affair, I think less is more from you. Let her do the work. If you do it yourself, you will resent it even more. You can't make her do it, she has to want it on her own. Let her do that for you, and you will feel she is "all in." You may have to let her know what you want, but once you throw it out there, let her take it and run with it. That's what she can do to move this forward.
For example, throw it out there to her about your trips, what is she going to do to make you feel she won't be cheating again, not just other man, but other guys? When I had a problem due to the affair, I made it my wife's problem. It was her fault we were in that situation. I wasn't perfect, but I was all into her and our family. She caused this problem, she'd have to put in her full effort to fix it. I'd tell her we have been married almost 20 years and I always trusted you, and you betrayed me. You BETRAYED me. I DON'T TRUST YOU anymore AT ALL. What are you going to do about this? What are you going to earn back my trust? Because this situation sucks and I'm getting older and if you think I'm going to live like this the rest of my life, you are mistaken. I WILL LEAVE YOU if you don't figure this shit out.
Many times over the first months to a year I would say to my wife, whatever you're doing, I don't think it's enough, you better step it up.
My wife was not extremely flirty, never had been. She had F-book, I didn't, but I had all her passwords and I would go on her Fbook once in a while. Same with her email or texting, I always had access, it's just that I never paid all that much attention to it. I trusted her completely. When I was only a day or two into it after finding out and confronting the affair, I went through her accounts, Fbook in particular.
My wife always has been a social butterfly. She stays in touch with a woman she shared a 15-minute cab ride with in 1985. So I would see she had about 400 friends, but I didn't think much of it. This was the first time I really scrutinized it. Other man was on there, of course. So were about 300 "friends" I never heard of, many of them male. A lot of "likes" for anything from these guys.
First off, other man has to be blocked. Next, I told her I'd be more comfortable if she only had "friends" with people I personally know and approve of in real life. She told me which, and I told her. The male "friends" I told her mostly she had no problems with, but some she said "oh this is the husband of the woman I shared the cab with in 1985, if I unfriend him, his wife is going to ask why, and what should I say?" And I told her, why don't you do something new for you, there is this thing that you maybe never heard before, it is called "telling the truth." Some people have been doing this for years already. Why don't you try it? If your girlfriend asks why you unfriended her husband, why don't you just tell her the truth, that you've been cheating, your husband found out, and now he doesn't trust you, and he wants you to unfriend anyone he doesn't know and approve of in real life? I told my wife I didn't really care what she told her friends, but she shouldn't blame me, because it's not my fault you cheated and I feel what I feel, you can either help me through this or you can not. Your call.
Timetoact, I have been a little tough on your cheater, but you have read a few of the threads here, aren't other spouses' cheaters almost always seem more despicable than your own? We are only posting the negative parts about our cheaters.
This initial few weeks after finding out and confronting is the worst. The rollercoaster goes down the deepest and steepest. It seems like a one-way ride to hell. Then you stabilize and it still sucks, but you get used to the idea that your wife is who she is, she's not who you thought she was. That's when I wondered a lot about "you used to hate cheaters, WTF?" Then it gets a little better, you get used to it, and you reach the "acceptance" phase. You don't get to reach that level until you finish your initial requests are taken care of. That's why I say do the poly now if you can, you can't move forward without it and your current situation is about as bad as it will get. I didn't go on the internet until after about six months, so I did what I thought was best. I expected things to be done quickly and, if not, I really was ready to go, though I didn't tell her. Maybe she could sense it, but if I asked for something, she did it pretty quick, usually immediately on the spot, even if she didn't like it.
My advice in summary is to let her do the work and get it done quick, then you can move on to the next less crappy phase, and it is truly beyond your control, you can ask, but she has to do it.