I've always sort of felt like the longer this goes on the more it is actually in my favor that she will start to come out of the fog and the consequences will start to take root and make her actually think about what she wants
Maybe she might start coming out of the fog, but by that time, will you still care what SHE wants?
In the beginning, we're so shocked by the betrayal that often our kneejerk reaction is to try and save the status quo, to put things back the way they were, BETTER than the way they were even. We want to fix everything, and the threat of loss makes us feel like we've never loved our WS more. But that feeling eventually gives way to hurt and insult. As time goes by, we realize that no one can MAKE someone throw away their own values and that the person we've loved and been devoted to all this time is capable of this kind of perfidy, and that it's not about us or anything we've done. It's about our WS's selfishness and the deficits in their character that make it possible for them to say "yes!" to betrayal. Intellectually, we understand that we should be angry, sad, done with this person, but our response is bound up in a reflexive fear of abandonment and terror at the prospect of losing all the normality in our lives.
Your WS is piling up the damage. Her indecision is salting the wounds and right now, while you're reeling in shock, you're like a guy with a really bad laceration who isn't feeling the pain and blood loss yet. Time changes things though, and every day your WS fails to respond to your injuries has a price tag.
This is one downside to playing the waiting game. The other is that the longer a separation goes on, the more likely it is to become permanent. Life has a way of moving on, and as time goes by, you both become accustomed to being without each other. When you're on friendly terms and doing this kind of "pick me" dance, she's able to ease her way out of the marriage at her own pace and comfort. You're providing a safety net while she explores the options... but that also means that any one of those "options" is an equally valid choice in her mind.
In a way, the fact that I'd already seen some emotional infidelity from my WS prepared me a bit so that I was able to make the choices very stark for him. In hindsight, I do feel like if I hadn't, we wouldn't be together now. I had to know that when push came to shove, he was going to pick me and our life together, and that has made a great deal of difference in how much damage there was to overcome as R proceeded. By the time he was caught, he'd become emotionally enmeshed to some degree with an OW and felt like he'd made promises to her that he was having a tough time breaking. Here's the thing though, EVERYTHING was on the scales. It was a binary, either/or proposition. Here's your wife of thirty years, the love and respect of your children and extended family, your reputation, your financial security, your life as you know it, and here's the OW, a cheater and a liar in her own right, along with all the expectation she's going to have for you. At a certain point after he'd been caught breaking NC a month after dday, he had about thirty seconds to make that choice.
This is YOUR life. Yours are the boots on the ground and YOU are the one who has to live with the outcome. Right now, you're probably feeling a lot of pressure to make decisions and to somehow not make a mistake. That stress though is kind of an illusion in some ways because a lot of what we worry about in the beginning is really not in our purview. We can't MAKE our WS do the right thing. All we can do is decide what we can tolerate and then set our personal boundaries accordingly.
You're going to be okay. It sucks and it feels like it goes on forever, but in reality, we do get through it. We're all still here, and you will be too. Take your time. Educate yourself. Set your boundaries. Take care of yourself and your kids. Life is going to feel really messy for awhile, but in time, you'll muddle through. Have faith in yourself.