I've read on here before about not blaming the other woman if husbands cheat then it should be on them, the other woman is not to be blamed because she didn't make promises to the wife.
However! I've recently read about the phenomenon of the 'homewrecker kink'. Women who get turned on by having sex with married men.
Years ago I was unaware of this phenomenon. Years ago I also turned to this forum for advice. Strange things had been happening. I was convinced my husband was not having an affair in the normal sense but something was certainly odd. It was like there was a woman in the background. One who could be met for very short time periods, at odd times. Occasionally, I thought a woman had been in the house while I was out, even for short time periods. A couple of things went missing, then later turned up. He went AWOL early mornings, once on holiday. He lost something, then later found it. Lots of other things were happening then too. Too numerous and specific to mention.
My DH has always been adamant he has never had an affair though but I wonder if he did then know a woman with a homewrecker kink.