I don't need to read anything back, but I think you might have missed the point I was making and landed somewhere adjacent. I said Vivian doesn't want to humiliate Hutch, and berates Christian when he does it a bit. Christian humiliating Hutch isn't something I've really commented on. Stuff like the sex in front of the house goes back to the old argument we had a couple of hundred pages ago - it's humiliating for Hutch, but that's not Vivian's intention. She isn't doing it to humiliate him, even if that happens to be one of Christian's motives (and I'm not set on that, it's just a by-product that he's perfectly comfortable with).
I get it, but I wouldn't call myself a Vivian stan (and not just because it's not terminology I ever use!). I'm just trying to see all sides of it, trying for an impartial view I guess? I do think that she has limits though, and belittling Hutch (knowingly and intentionally) is one limit that I think she still has. The test will come if such an occasion arises that there is specifically sex in front of Hutch, outright, everyone knowing about it, or something similar to that. We will only know at that time whether it's a line that Vivian will cross, but at this point, I don't think she would - at least not without Hutch permitting it, and I don't know if that is something we'd get to. Typically, I would probably guess we'd get there, but in this game, I just don't know, as it does still manage to keep us on our toes and mostly avoid the usual tropes.
I dont like women being called whores as a rule, so I get that my stance on the terminology won't fit the norm, but for me it would come down to the literal sex for payment. Here, she receives a payment for consultancy, and the hotel was "a bonus for both of them" - the contract would have been signed even if she didn't have sex, according to Christian. Absolutely you could argue that she was being paid for the sex, and I get that it's a very light grey line, but ultimately her payment was for the consultancy. There's a bit of a leap of faith in Christian's words there, and he's not exactly good for it, but there you have it.
In terms of why people are calling her a whore outside of the hotel signing, I don't buy it. She's wrong to have extra-marital sex behind her husband's back/without his approval, but that doesn't make her a whore. It makes her a bad person, or a person in a bad situation. Or as per Sunshine's summary, she's a woman with needs that were not being satisfied, and she's found a way to get what her husband can't give her. Is what she is doing right? Absolutely not (IMO), but I wouldn't call her a whore, because it's something that has very specific connotations that are covered in the paragraph above. This is where she is a bad wife, and although again it's not a word I like to use, maybe you'd call her a slut (or a hussy, if you want something that sound sa little less harsh).
(I know and fully understand that my position on that one is not going to be the common position, but that's just how I work, and that's fine.)