I'm going to take a more nuanced stance.
I dont think BeyR is taking blame for the affair. I think he's trying to see what he could have done better regarding the marriage.
Beyr: Be very very careful with that thought process. It can easily lead to "X > Y > Z"
Right now, whatever she tells you should be taken with a heavy grain of salt. She's searching for ways to justify her actions. Only see it as how SHE felt, not as the catalyst for this reaction.
Right now, take NO BLAME for ANYTHING. It just shifts some of the focus off of her actions. Your role in all of this will be worth thinking about LATER.
Figure out what you want to do. If D, just D. If R, having her figure out her own thought process will help identify her insecurities and should be done with her own IC.
Right now just focus on taking care of your psyche and emotions as best as you can while you figure out the next step. Maybe read some books on how language can be very deceptive to prime your mind for watching her actions rather than listening to her words.
And don't trust what she says. A suitcase full of goodies....
It meant (assuming you didn't know she had these things)
She thought about it.
She searched for items she wanted.
She thought about what the OM would like.
She actually bought the stuff.
She figured out how to get said items.
She figured out how to hide them.
She probably used the races AS her cover.
She figured out how to hide their convos.
She actually went and did the act.
She reflected on it.
She came home and lied.
She did it again.
Im my specific instance my XWS made me think it was for me.
Point is, she wasn't drunk and horny. It didn't happen once. She didn't tell you. This was thought out to some degree and you're downplaying that. At any of those points before the rinse and repeat stage she could have made a decision to stop, or inform you.
Going back to earlier, at some point in the future, this will be an opportunity to self reflect if you so choose. In what ways are you unhappy with your contribution to this marriage? What are the signs that may have pointed at her being an unsafe partner. Next time these signs pop up, how will you react differently. This self reflection is for your own progress as an individual.
When she says she wishes you were there and you feel bad sitting on the couch... as others have mentioned. Did she push real hard for you to go? That entry to me feels off. More like, she goes on those sex trips (that's probably what they are) to feel good, and she'd feel better if you cheered her on, but also if you were there she couldn't have sexual experience with another man. Just my feelings.
[This message edited by Ganondorf at 11:49 PM, September 4th (Wednesday)]