I think there needs to be slightly more nuance here:
I don’t think women who are “willing to cheat” necessarily know that in the moment you’re talking to them.
Women (usually in daygame) that I’ve slept with that told me they had a boyfriend upfront (and I did my usual dismiss + allow her to qualify) and they did have an actual boyfriend - these women haven’t cheated before and didn’t expect talking to me would lead to cheating and so quickly.
So, these weren’t women who have cheated on their boyfriends before, with the current or historic boyfriends.
I have slept with women who were in relationships that I knew had a habit of cheating, but these were more or less girls in my social circle and from work - so I was well aware this cheating was likely and they’d hinted to me that they would cheat and have cheated before.
So, I don’t think women know upfront that they’ll be willing to cheat on their current when you’re talking to her - it’s a series of smaller steps leading there.