My reco:
Don't commit to R until you're sure you want R and you're as sure as you can be that your W will do the work necessary to change from cheater to good partner. Distinguish between what you want and what you will do.
That is, no matter how much you want R,my reco is not to choose R unless you both willing to do the necessary work. If your W is a lousy candidate for R, it might be best for you to go directly to D. By the same token, your WS may be a great candidate for R, but if you have to force yourself to R, maybe D is a better choice for you.
Serial cheating probably necessitates more, and more difficult healing work by the WS, but some serial cheaters do what they need to do. Through the years, SI has had several members who were serial cheaters and who contributed a LOT to SI and to SIers.
I recommend thinking of R as 3 healings:
1) You heal you. Most BSes are inundated with immense amounts of one or more of grief, anger, fear, shame on d-day. The largest part of your work is to process those feelings out of your body. A good IC can help you do this.
2) Your WS heals themmself. They need to change from cheater to good partner. I think that requires IC for the WS, but others disagree.
3) Together you build a new M.
This means you can recover from being betrayed without your WS; that is, you can survive this crisis and thrive without your WS, but you need your WS to R. You can heal yourself because you control yourself. You don't control your WS. I recommend making 'survive and thrive' your primary goal and R your stretch goal.
Have you read the Healing Library here? If not, there's a lot of good stuff there. Click the link in the yellow box in the upper left of the SI pages.
I think there are a number of keys ingredients to R.
First, what do you want? Do you really want R? If not, don't lie to yourself - both R & D are morally good responses to being betrayed. R is hard work, and wanting it makes it less difficult, but it's difficult even when you want it. D, too, is hard work.
I recommend figuring out your requirements for R and seeing if your WS will sign on. If they won't, perhaps they can come up with something else that will meet your requirements, but if you can't negotiate something truly acceptable to both of you, great - you can go directly to D. Otherwise, you can monitor them for 3-6 months and commit to R for yourself if they are (is?) consistent in meeting your requirements.
The requirements need to be observable and measurable. That way it's easy to monitor progress and make adjustments as you go along.
Common requirements include:
NC - no contact with ap; if ap initiates contact, report to BS and together decide how to respond
Transparency - BS has passwords to e-mail, voice-mail, phones, etc.; WS keeps BS informed of whereabouts, activities, and companions at virtually all times
Honesty - WS answers BS's questions when they're asked, although sometimes a break is necessary, sometimes an answer is best deferred to MC session, etc., no more lies.
IC for WS - to change the thoughts and feelings that supported the A, with signed release that enables C to talk with BS about WS's goals and progress (so the BS can make sure WS's IC isn't being lied to).
IC for BS - for support - and for resolving any internal issue that comes up
MC - to help communications between the partners. Be careful to avoid MCs who don't deal with the A first. An MC who starts off trying to identify systemic problems probably won't help. You need someone who will help resolve the trauma before going into systemic problems.
Some (Most?) people have individual requirements - my W had to arrange dates for us on a weekly basis and must initiate sex sometimes. What do you want from your W?
And R is a joint endeavor - if one of you hides objections to the other's requirements, you sabotage R. And you have to see your WS as a human being of worth equal to your own to make R work. You don't have to see your WS as a human being whose worth is equal to your own, but you sure can't R, except with an equal.
*****
** NOT posting as staff**
You can't start the recovery process, you cannot start healing, if you live with the person who inflicted the trauma. The reality is, your marriage is over. She ruined it. The best you can hope for (in a reconciliation) is to build something that both of you deem is an acceptable alternative.
Apollos, I'm very sorry your W betrayed you. I have to say, though, that you drew an incorrect conclusion from your experience.
I have no doubt that you made a right decision for yourself. I also have no doubt that your 'reality' is not shared by everyone. Just take a look at the 'Positive Reconciliation Stories' and 'Thankful Thursday' threads in the R forum.
It is eminently possible to R and to build a joyful M and a joyful life after being betrayed. It is eminently possible to start recovery on d-day, whether one lives with one's WS is or not, all other things being equal.
R works for me. That doesn't mean it works for everyone, but it does mean that R is possible in some situations.
Every BS's task is to figure out the best path to follow in their own specific situation.