It is difficulty to stay within the realms of reality because it requires a developer to ponder about human nature. It is easy to do stupid.
For me, I view it like this:
If the woman "falls" so easily, and gives up so easily...then what's the point? If a bitch spread her legs like that...what's the point of corruption? She's just an easy bitch. Not worthy.
If my wife spread her legs when some big black guy tells her to, that is sexy. But that is also weak. I do not like weak women. I like them strong. The stronger they are, the harder they fall. If a woman spread her legs within 10 minutes in the game, it just means "that's all she was ever worth".
Developers are terrible at this. They need to meet some real women. If they can't do that, just put your self into the shoes of the women and swap the gender. Men and women are not that different at all.
As you may know, I totally agree, I was the one of the guy who doesn't feel anything about "easy" woman. Slow, but reasonable with good motivation of such seduction. I'm also tired of "good house wife falls to BBC within 10min" that is just fantasy.
This is the reason why devs should meet real woman, or at least try read some books.
Long ago I left some links of other erotic novels like literotica, there should be other good short ~ medium stories which would be good enough to motivate / give some hint to devs, to build a good storyline.
What I'm drafting these days is the superheroine's seduction. By using superheroine, I could save some time for character development, because readers know that she is superheroine, and they could easily expect her character, like she is justice-oriented, flexible and strong, maybe feel lonely because she is acting alone or only with small team.... This also fits well with your "stronger they are, harder they fall".
Right now, I'm thinking about motivation. I'm trying to develop a good motivation of "how such 'high' superheroine falls to 'lowest' male" story. Set up a Sci-fi superheroine world can ease the burden of making good motivation story with some good imagination. I'm not thinking about mind control or drug at all. But I may need to use kidnap-hostage situation, at least I need something to initiate her seduction saga. I wish to make it feels like NTL (not NTR or sharing or swapping, villain just taking out girl from boyfriend or hubby, preferably without knowing him) so she will have a boyfriend. But maybe, I can just neglect boyfriend or husband, in this case her 'boyfriend' or 'husband' role will be people of the city or town of the story? But I'm not sure how much the story of "Villain takes the superheroine from people" would give the feeling of NTL, so I may still introduce her a boyfriend or fiance.
My villain will not be a just bad guy. He will be really ugly as hell, but he have his own story and reason. And this will be the initial hook to lure her to fall in his trap. Of course superheroine will not fall to disgrace with first 'close contact'. But repetitive abuse, and issue with people and crowd (like Batman storyline) will make a crack in her mind, slowly.
Like wise, sometimes it is good to set up main character's job or personality in specific way, this could help to introduce character to readers in shorter way. Other than superheroine, maybe fall of feminist or sport star, or etc...