I am in a very sarcastic mood, so please forgive the rant, but your WW's blameshifting has gotten under my skin. You deserve better. And believe me, there will be a time in the future that you will look at these things which much less emotion.
There is this rhetorical/cognitive exercise that Waywards emoy that I like to call the If/Then shuffle. It works like this:
Yes, I had an affair, but you need to understand and appreciate all of the factors that led up to, contributed to, my choosing to have the affair.
This is usually the foundational statement and it is intent ended to begin he shifting of responsibility away from the wayward and towards the betrayed. Usually I shut that shit down at this point by getting them to say the exact same thing again, but replace affair with the word rape and see how it holds up.
Anyway, if you engage, the next thing is the "we had issues or problems in our marriage". This doesn't actually mean that we had issues, only you.you see, the wayward is usually immune from any or mist of the premarital issues, however, the shit that the faithful partner brought to the table, well, those were serious...serious enough to force the poor wayward to cheat.
Are you starting to feel sorry for the poor victim yet?
Now, since both partners brought or had issues in or with the marriage, there are now two sides to the conflict. Here is where the 50/50 bullshit gets trotted out. Two sides to an issue is meant to muddy the water in an argument. It is meant to take the conversation to "I was wrong" to "we were wrong" and ultimately,to "we both need to fix this thing" that I only broke.
This is classic bothsideism. It is the foolish notion that since there are opposing views, they must be of equal merit, like all arguments are somehow coins one can flip. I think a school administrator caught some flak down south trying to get teachers to teach both sides of the holocaust. You know, teaching why genocide is a good thing just to make neo-nazis feel included and valued...
If a wayward can get you to shoulder even 1% of the responsibility for the affair, they have a victory in their minds. It's all about the gymnastics. Remember, the ability to rationalize the unreasonable allowed them to justify their actions in the first place, so if it worked before, they'll certainly give it a shot now. You see, if they can get you to admit that you were the source of premarital stiff, then it become a both of you situation. And both means two, and since the wayward is only one of two, then as a percentage of the partners who were involved in a relationship with problems, it translates into....let me see.. yup 50%. And 50% means you now get half the blame. It is a mindfuck.
If a wayward can shave off some responsibility then they can see themselves as at least a partial victim of circumstances beyond their control. Sure, they killed the marriage, but it was manslaughter, not murder... and even justifiable manslaughter at that. So really, it wasn't really manslaughter, but a cry for help in a tourturingly difficult marriage. You see, they are not the abusers, but the real victims in this terribly unfair situation, and by not immediately recognizing the infinitesimally small part you had to play in a situation you were not even aware of, you become the real abuser. Am I forgiven yet?
So, you get the reality of our predicaments as betrayed spouses.we have inadvertently created a perfect storm in the relationship by foolishly fostering a no win situation for our respective partners in which we have subtly removed every conceivable solution to any marital issues no matter haw large or small, save inserting or have inserted into their bodies the genitalia of a third person.
And this is why, when my STBXWW told me that I HAD to understand how my actions in the marriage contributed to her decision have an affair, I told her to go fuck off....