What I find weird is that this whole discussion presupposes that a woman gives away sex in some kind of transaction, not that she has sex because she desires it

What I find weird is that this whole discussion presupposes that a woman gives away sex in some kind of transaction, not that she has sex because she desires it. In the first case we could talk about some kind of fraud. Maybe she expected a long term relationship in exchange for having sex with the man, which he actually couldn’t offer because he was married, so she feels that he didn’t live up to his part of the bargain. She gave something away and didn’t get anything in return. But that whole premise is just sad. If she instead had sex because she desired it, in the same way as the man, which I hope most people agree is how it should be, it wasn’t a transaction. And she wasn’t cheated on anything.