I think a lot of fandom hates Peter right now. Am I the only one who doesn't? I want to take a moment to look at the situation from both POVs.
Olivia
The simplest way to put it is, it's probably a lot like coming home to your significant other after a long time away and realizing they've been cheating on you. Obviously it's not quite the same, but it has to have the same emotional sting... plus more. Not only did Peter 'cheat' on her with another woman, he 'cheated' on her with another Olivia. From our Olivia's perspective, Alt!Liv is stronger, better, happier, more loved. Her adequacy issues over the situation are made very obvious in 'Marionette' when Olivia asks Astrid if Peter seemed happier with the other version of her.
So, yes. Heart wrenching, confusing, she feels betrayed, unloved, unwanted (this universe was doing just fine with a happier version of herself, right?). Right now she can't touch her own things without knowing the other Olivia has been rifling through them, sleeping in her bed, sleeping with the man she loves. She can't even stand to look at Peter. Can anyone stand being with the person who cheated on you? I've been there. I know how it is, how much it sucks and how much you just want to throw up and never be near them again. I think over time, the pain will lessen for her but will never disappear completely. However, over time, she also might start seeing things from Peter's view...
Peter
Poor, poor Peter. Everyone hates Peter right now. They have sort of good reason to, but if you're hating Peter over his blindness and stupidity, consider this.
Peter was ultimately raped. Over and over. And he enjoyed it. Can you imagine what that will be like for him to ponder in retrospect? Sure, he lost his lover, he lost the woman he thought he loved and knew that the moment he came clean with Olivia, he must lose her forever, but besides that; he was ultimately raped. Not just physically but also emotionally. So what do rape victims feel afterwards? Guilt, hopelessness, responsibility over the situation ("this is all my fault"). Sound pretty familiar, doesn't it?
I just wanted to mention that the fact that Peter was honest with Olivia? That blew my mind in the best of ways. I wanted to give him a hug. I think the fact that he came clean with her overrules the fact that he slept with the wrong Olivia. He could have so easily lied about his relationship with Otherlivia so that he could have his Olivia back. But you know what? He wasn't selfish like that. He realized that even if he would have everything he wanted, with the right Olivia in his arms at night, he'd have to live with the guilt either way. So would it be better to be honest with her then to hurt her down the line when things would be so much worse for both of them? I really congratulate him for being an honest man. I can't imagine how hard that would have been.
So why the hate, Fringe fandom? Sure. He probably should have seen. And why would being in bed with her make a difference? He doesn't know his Olivia's love making style. If Walter, Astrid, Broyles, and no one else could see it, why put the blame on Peter? "Seeing her at her most intimate" isn't an excuse since he had never seen his Olivia at her most intimate. Had he, then yeah, there would have been no excuse for not seeing it.
The fact remains, Lying!Liv was good. She's Olivia. She's perceptive, observant, and good at what she does. Every extra smile and every bit of ignorance had a perfectly good excuse. Like our Olivia said, she knew the facts. She knew that if Olivianate (okay, worse one yet, sorry) slipped up, she'd have that excuse.
I also can't stand it when people claim - righteously - that Peter thought with his dick. I joke about it, too, but seriously. How can you look at the way he smiled at Alt!Liv while she was in bed with him, nuzzled her hair, kissed her way, looked utterly in love and say that was because of his downstairs head? That was because of his heart. Which is heartbreaking and so tragic in its own right, because realizing how in love he'd been and how, for those two months, he'd had a chance to manifest it, you realize just how much he lost.
Conclusion
They've both lost everything. She's lost the man she loves, he's lost the woman he loves. They're at equal grounds. He was blinded by love, and now she's blinded by pain. I don't think he'll push or even be waiting. I think he'll step back, give her space, give her time, but he won't be expecting her to make any positive decision about him. He's guilty. He knows he screwed up. He also knew that by telling her, this might happen. I think that shows just what kind of man Peter is and just how far he's come from that egotistical smart ass in season one.
I think something huge has to happen for Olivia to realize how much she still needs Peter. I have a feeling he'll come close to death over whatever reason and the fallout of that will be beautiful. She'll hopefully start to see things from his perspective once her own pain stops being so blinding.
Thoughts?