Well, trust and believe me when I tell you it's not been a picinic in the park - he and I both have done horrible things to each other (fights, accusations, behaviors, etc. but not violence). Age and maturity is part of it, well for us anyway. And for real? As many people have told me to leave him, I can't believe he's stuck with me this long.....We aren't perfect, but we are dam sight better then we used to be. Now having said all that, trust me when I tell you we are nothing special, if he and I can do this, so can you and yours if that's how things are meant to be (or you choose).
I don't want to finger point because I only have your viewpoint, BUT I am a die hard ridiculous optimist. I can find the good in anything. Really to the point that people sometimes want to slap me so I am calling bull on that - if that was true, she could find things that are good in this whole life experience thing you have for both of you and she's not.
I don't know that you can make people understand well normal people if you know what I mean. I am even more hampered by my entire lack of ability to identify feelings. Has she read books? If not, is she willing? Maybe you could prescreen some for her reading list? I love books they help a lot.
Do you have an "alernate support system"? If there is someone, anyone you can trust or here for that matter that you can lean on for that? That way you may be able to leave her out of that loop for now anyway and progress on your path. I think in my marriage the hugest thing (in my opinion, he would differ) that's changed is that he gets I do not mean to be how I am, I can't help it and I don't know better, though I am growing. Infidelity is a deal breaker, but he's cool with where I am at. It wasn't always that way, but I am thinking him watching me actively persuing help has changed his mind, well that and me sharing with him the things I have learned you know in a way that is not like SEEEE You are wrong, but like wow, omg check this out (ie. my therapist telling my that I am my mother's "other woman")
Marriage is hard period and then add this in and it gets harder. A book that will make it easier for you to relate to her is a book called The power of a praying husband. Now wait, before you freak, you don't have to be a christian or what not - these books just take the nature of a man or a woman and put in a way that shows how we are wired and how that makes us weak or strong. It just can generate empathy and compassion for the opposite sex in a way I 've never seen before. I had tons of OMG moments I was like OHHHH that's why men do that, he's not just being an ass.
So Yea, I need some answers before I can move on :D