Woman here, weighing in. Hippo is right that we sometimes have trouble with our "hardware" too. For me it peaked during perimenopause - just a total inability to orgasm (though it all felt nice) and then a major loss of libido. Up until then, WS and I were pretty well matched in the bedroom. He would have occasional issues, usually after drinking, but his diagnosed ED and taking pills began a few months after his affair started. (He claims that he and AP weren't yet "going all the way" but they were definitely intimate.)
At the time, I had no clue about the affair. He was overworked, overweight, and snoring badly, and those were easy explanations for me to accept as the cause of his ED. The pills worked okay enough, though he had to experiment a bit with dosage. Around a year after the affair started, he claimed his libido switched off and we entered our dead bedroom phase. That was a lot more emotionally confusing and hurtful to me than his ED.
Fast-forward 2 years. Post dday, post STD testing, etc., he still had ED issues, maybe worse than before. Our sex life was still pretty terrible (what's the opposite of hysterical bonding?). He said he felt bad about the ED and worried that I'd feel rejected by his inability to perform. He also started to have very high blood pressure around that time and the pills were giving him headaches. With all that, he stopped having sex with me again, and that made me feel 1000% more rejected than the ED.
Eventually it came out that he "sometimes" needed the pills with AP, but not always. With me, he always needed them, and even with the pills, sometimes things didn't work. I did my best not to pressure him - we did sensate focused touching, non-PIV activities, whatever. I was so starved for touch and sexual contact, I was ready to accept anything, and he couldn't even do that for me. I think I had a big thread about it here around that time.
Ultimately that's what killed my desire for him. It wasn't his ED. It was his obvious lack of desire for me - or his inability to see beyond his own guilt and self-pity (the result for me was the same). In your case, I think your WW is walking a similarly dangerous road that might eventually snuff the flame of desire you have for her.
After dday, the remorseful WS will show you how much they want you, and that includes catering to your needs in the bedroom (in whatever creative ways work for both partners). If they can't do that, I don't know about you, but in my case, resentment and hurt built up. I discovered that orgasmed better on my own than with him (for the first time in our 30 years together). One day, we got into bed to have sex, and I just started crying (before anything even happened). I couldn't bear the thought of him touching me. And that was the the last straw. A couple weeks later, I told him I wanted to separate.