There is this myth that people have on the board that an OW=Replay. That is not true. Yes, it is common, but OWs can outlast Replay—or OW searches. If a couple divorces and then one or both seek other relationships do we look at them and assume they are in Replay because they are not trying to get together with their original spouse? Doesn’t that seem a bit absurd in that context. And yet we transfer it to our MLC context and it must be Replay. Some MLCer come through the crisis and choose not to return to their spouses and actively search for and find a new partner. That doesn’t mean they have gone back into the tunnel! Do we really think they are going to remain celibate for the rest of their years? Come on.
I don't know how OWs can outlast Replay, when the initial OW or even multiple OWs can be part of the symptoms of their issues/crisis.
The marriage was put asunder when (A)they decide they don't want to be married anymore and (B)there is another person involved; most likely adultery, if the affair has gone physical.
What RCR is illustrating in the later part of her answer, however, is a distinct POSSIBILITY of the crisis...there are MANY things that can happen as a result of the crisis.
The MLC'er can continue to change and evolve, EVEN as they decide they truly do not want the marriage anymore; and that decision needs to be respected and accepted.
It is also possible at the breaking of Withdrawal, to decide NOT to continue with the marriage. That doesn't mean they have moved backward into Replay, either.
It's THEM, not the LBS.
Remember they are making some important decisions during this time, and they are examining their marriage closely during this time, even as they wander within the fog of MLC.
BUT---it is also possible to decide at ANY time to walk away and never come back, because the MLC'er feels the damage is too great to try again...and this is up to them, NOT the LBS.
By that time, though, the LBS is no longer a part of their life, in their own minds, and the MLC'er can or has moved on either to another marriage, OR even they could decide NOT to remarry for whatever reason.
These literally choose to break ALL ties, and it is hard for the LBS to accept, especially the ones who've stood for years, not wanting to accept that it very well could be over.
Making choices that seem to not be acceptable, affects the MLC'ER, not the LBS.
Remember, they are searching even as they are on their journey, and they could very well decide NOT to continue in their current marriage.
You have to accept ALL possibilities of this, not just some of them. On top of that, remember, you have NO control over what they decide to do; you will NEVER have control over the decisions they make. Good or bad, they WILL decide.
These are the hard questions to consider...all the LBS can do, is grow and change, and hope that it doesn't happen this way...but it COULD....and this is ALSO something that is difficult to get your head around.
All of the analyzing in the world will not change what has happened, nor will it fix the problem that is inherent within the MLC'er....all you can do is get on with your life, learn the lessons, change what you can, accept what you can't and get on with it.
Hopefully, this will help.