I've left the ball in her court for now. I've explained my concerns, my feelings towards the lies and towards her involvement with this person but explained that I want to trust her. I've asked her to consider breaking off contact as it's the only way I see us moving forward. I've asked her to think about the situation if it was reversed. I don't feel that I can do anymore from my side, so I am starting to work on myself, think about my future and prepare to detach if/when she decides to tell me we are done for good. I've accepted that I cannot do anymore to win her back, or control her actions. I'm hoping some time apart gives her the space she need to really consider what she is throwing away.
Look, I get it, you are dealing with a lot here and it is happening rapid fire, because just a few days ago you started this thread asking if we think she may be cheating and you all but have the smoking gun. I will tell you, the one thing that this place has taught me, which includes my personal experience, you cannot "nice" a cheater back. Cheaters only respond to strength and consequences. Your marriage is a partnership between two people and as much as you may want to go back to the way things were a few weeks/months ago before it was clear she cheated, you cannot. If anything, CandidAd brother, you need to find your anger and stand up for yourself in this marriage. I'm not saying this to be harsh, please don't take it that way, but you just more or less asked your wife to stop cheating and if she would be so kind to maybe not talk to her boyfriend, you know, if she feels like it and you even stated that you left it for her to decide.
My advice is that you see a divorce attorney now, come back to her with papers and let her know that you've decided that the marriage is over and she is free to be with whoever she wants, just not as your wife any longer. Then go make yourself a sandwich or go mow the yard, it really doesn't matter what you do, just walk out of the room and don't let her try and manipulate the situation any further. Your wife is having an affair, at the very least an emotional affair, and given how she is now a 20 something party girl staying out until the early morning, it is likely physical and here you are asking her to maybe stop cheating. You don't ask your wife to stop cheating out of the goodness of her heart, you demand that if she is going to remain your wife that she stop cheating, go no contact and be fully transparent with you, starting immediately or else you are going to divorce. I think having the divorce papers drawn up is the way to go to show her that you are dead serious about your demands. And just so we can get that out of the way now, demanding that your spouse not cheat on you, a promise that she made to you and all the witnesses as your wedding, is not controlling or manipulating, it's just enforcing what was a clear boundary to you both when you got married or better said, it's the bare minimum of a monogamous relationship.
Maybe it is because those of here on SI have seen this movie too many times, but I'm actually trying to keep you from coming back here in a few weeks/months from now and posting an update in this thread or starting a new thread that she used the trial separation to monkey branch over to her new boyfriend and she is deep in the affair now. This site was founded on the principle to get people out of infidelity and there are only two ways out of infidelity, reconciliation and divorce...and right now, again, kindly, you've taken neither of those paths and have chosen to separate while still remaining in infidelity, or a place we lovingly refer to as "limbo" and those of us who have done extended stays in limbo don't want to see you reside there any longer than is humanly necessary and from where I sit, it isn't necessary for you any longer.