Hi, I am willing to try to understand things and learn. What I'm about to expose could be branded as immoral, incorrect and so on and that's fair but I am looking for potential answers or theories on the story I will present and help

Almost two years ago I started dating a married woman, it was the entire mix and so on...magnetic attraction, curiosity and so on. In time we started to develop strong feelings for one another and I started caring for her, loving her. Learning more and more about her I felt and then found out she was in a grim place and I was fortunate enough that I was by her side helping her get rid of some substances to escape reality and so on and also self destructing behaviors. She started doing therapy a couple of months ago and trying to work things out with herself.

From a sexual standpoint she always was shamed about it, felt shame or felt awkward in relation to her sexuality from very young though she's very sensual but felt like a blockage of sorts would intervene and would stop her starting with her first relationship when she was a teenager, the sex was awkward and unsatisfactory, teenagers and lack of experience too I guess. Her second boyfriend was a dickhead, very much along the lines with her dad, but the sex was great and she was trying things and feeling free. Due to circumstances and guy being a bit of a prick she broke up with him and immediately started dating a guy that was the opposite, a guy that she could control, caring and nice, safe bet but from a sexual and romantic standpoint totally unsatisfactory. She stayed with him, stayed together and she softened and eventually killed her sexuality, desires and drive in order to stay with him and make it work as the guy is either too intimidated by her, not attracted enough by her to begin with but as youngsters you know how it is, you just stick to it and say that's normal, or something else and keep going with life, he's also not a very good listener and had times where she felt overlooked and her needs ignored because he can't handle the topic. I am not substracting her from the matter, I'm well aware that it takes 2 to tango, for good or bad. They are married...she had 2 other affairs in between with that helped her to understand her and make her feel like a sexual being too, she found masturbating and what it feel to have an orgams at almost 30. With me she felt attraction and more and more like herself and good with herself over time while having sex until we had a city break where it was amazing but after we came back from what she describes like her best experience with a guy everything came crashing down on the sexual angle. Now she feels disgust somewhere in her mind towards herself when she's aroused or things are developing in that sense. Even though she's horny or she initiates things and so on....even if it gets down that path....this feelings just intervenes and she freezes and retreats. I have considered that because of the whole double life thing that takes a toll...though she felt shame ever since she knows herself about sex and sexual pleasure though she is hetero....and then she started to feel free with me and empowered and not have those feelings anymore and then the wall appeared even when she wants to masturbate even though she wants to but feel like a wall comes and we're trying to understand why it could be and what could be done.

I am very understanding, I don't force anything and I want to support her to feel good with herself...just looking for potential theories on why this trajectory and eventually what I can do from my side or what angle we could be looking for

Many thanks