Hi Groot,
I don't know a bunch about your story, but I did read your other post. My husband had an escapist, cake-eating A too. He never intended to leave.
Despite the fact that my husband was pretty honest, pretty quickly (as compared to what I see here) and never once tried to gaslight me or blame me about the A, I asked a million questions a day for months, maybe a year. I continued to ask questions after that point when they occurred to me, but by then I felt I had a pretty good handle on what went down. When I was in cross-examination mode, I would ask the same ones over and over and over as my brain tried to process it all and piece together the timeline of the affair while recreating the timeline of my own life during that period, all the while trying to make sense of it all. This is normal. It's a response to trauma - you have been traumatized.
It's also normal that he may not have all the answers now (which gives you even more "reason" to keep asking the same questions over and over again). When I say that, he should of course be ready, willing, and able to answer the "fact-based" answers, but he probably has less insight into the WHYS of it all - which, if you are anything like me, is what you will be struggling with the most. That's the hardest part and something you both should be working on now and in the months ahead (if you intend to attempt to R). So don't feel bad about the questions, keep asking them. There can be a certain point where your purpose in re-asking the question is not productive or healthy but at 3 months out you are nowhere near that point. Get him to make the timeline - even if you think you know it. It was a helpful exercise for my H as well as for me. Eventually, assuming he's being honest and transparent now, and working at being honest with himself in IC, it'll eventually start to make sense. When I say "make sense", I don't mean you're going to wake up one day and be like "ah, I get it now. It makes perfect sense to me how my husband could risk his life and my life and the lives of our children for some trashy side piece who he never loved" - that will never "make sense", but you'll get a better understanding of what the truth is, and what his thought process through it all when you understand it better.
Wanting reassurance is also normal. You (appropriately) feel unsafe and insecure in the relationship, and it is therefore normal to want/need/crave reassurance and feel territorial. That said, there is not a single magic thing he can say that will actually provide you with the feeling you are wanting right now. The daily rollarcoaster of emotions is intense. There would be times when I'd realize I felt okay for a minute, and it would immediately send me into a spiral. The rollarcoaster will slow down a bit when you start being able to rebuild trust, which is understandably incredibly difficult to do after betrayal. The only thing that worked in rebuilding trust was honesty and consistency and patience over time. That doens't mean he should stop trying to comfort you in the moment when you are triggered and spiraling. There is benefit in that, even if it doesn't always feel like that. If nothing else, it's showing you that he is prepared to stick it out through the good and the bad. It will show he has empathy and understanding for the depth of the pain he has caused. He might begin to appreciate how large this looms in your brain.
I too, thought about it the A constantly. It was exhausting. To be honest, I'm surprised I was able to keep my job during that time as I was NOT engaged in work in the slightest. I remember being in the middle of a yoga class 8 months out realizing that I had managed to go an entire 15 minutes without thinking of the A and celebrating that fact.
I have an issue now comparing myself to the OW now too because she had certain features that I do not that I believe led to the Physical part of the affair.
This part is normal too. I've always had a pretty healthy sense of self-confidence and felt pretty good about the way I looked until D-day when my confidence took an absolute nose-dive. I remember feeling self-conscious even changing in front of my husband after that (was he comparing me to her???). So although your feelings are valid and normal right now, I need to assure you that there is nothing about her that made him cheat. He didn't pick her because she had long legs, or nice teeth, or big boobs or whatever it is about her that is now making you feel inadequate right now. He picked her because she was there and had low enough morals/ethics that she was willing to hook up with a man who was married and had 4 kids, despite the fact that he never planned on leaving his wife. Ugh... can you imagine how pathetic someone like that must be? I'm not saying he didn't like the long legs, or nice teeth, or big boobs or whatever it is that you think is objectively good looking about her, or that he wasn't physically attracted to those features in the moment (we can all be physically attracted to multiple things), but those are NOT the things that made him cheat. I don't care what he has told you post-d-day when he was trying to justify his behaviour to you and to himself, the A was not about her (just like it was not about you). It was about HIM. (It always is).
I could make a laundry list of some of the most beautiful/talented women in the world who have been cheated on. Halle Berry, Emily Ratajkowski, Behati Prinsloo (a literal Victoria's secret model!) Eva Longoria, Sienna Miller, Beyonce, JLO, Shania Twain.... I could go on an on. The point is, that none of these women's partners cheated because their spouse was not beautiful (or smart, or talented, or successful, or whatever it is that you are telling yourself is deficient) enough. There is a thread in the JFO forum called "Honey They Always Affair Down" that I will bump for you. Read it through. This is a rule, and I have been here long enough to know that your case is no exception to this.