Who can Cait ever sleep around with that you might be interested in?
And when are you forced to see Cait if you leave her at the Frost Hound?
I really can't think of any instances of any of those things offhand.
Brint and her have sex. (Only find out about this is if you ask him about his opinion on Cait.) So if Brint is your main love interest Cait is cucking you. In general I'm kinda curious why Brint doesn't get as much hate, because its made clear he regularly sleeps around with other women.
Berwyn, Etheryn and Everlyn you have you have to give the ok on these scenes. (So, its your own fault if you don't like these scenes.)
You can see Cait walking out of an alley covered in cum. Its implied she was blowing someone. (You don't actually see the scene, more so the after math. I'm assuming this done for world building purposes.) I don't know how to trigger this scene. But I believe it randomly triggers when walking around. Its basically flavor text for one of the tiles in Hawthorne. (The game doesn't stop you like when the blacksmith in Hawthorne is talking to the chick with the eye patch, so you can easily skip over it.) I typically don't read the these so, its easily missable.
I can't recall if its Boomer or Lusamine, but Cait has sex with one of them. (Minor Characters who I don't really care about, but I know they have some fans. once again don't remeber where this scene pops up, but I recall it being thing and annoying someone on the site. And no it not when you defeat them. Its in the frosthound.)
I know the at the wedding to the Horse chick Cait is involved in the orgy. Sure its not with any characters you care about (believe it was with the futa gaurds), but you still have to read about Cait having sex.
On whole I don't think Cait is the most offensive character, and I genuinely don't have a lot of animosity for her. I'm typically indifferent towards her. But, when she is constantly inserted into scenes (minor or major) I can understand why people are annoyed with her. That was kind of my main point.
Not really trying to jump on the Cait hate bandwagon, as most people have pointed out, she makes clear what she is and behaves in a way fitting of a whore. Its like complaining about water being wet. But, I wouldn't be surprised if someone made a mod to remove her like people did with Urta from CoC1.