There's unironically not even much cuck content far as I can tell. 'Cause I'm fairly indifferent to NTR, but I like the sharing scenes, so I always check those out and there's like 5 of them at most.
Cait doesn't actually sleep around except when you tell her to now, Ryn only has 1 single scene where she cheats on you (the one where she sucks the chick who likes elves dick for no apparent reason unprompted, even though she's not even that aggresive with you, so its kind of ooc) but that only happens if you reach some stat or other now, the orc only sleeps with people when you tell her to, too.
I can't even think of anything else you could call NTR. Maybe if you keep the minotaur as a guy?
Quin seems to be TRYING to cuck you with the tattoo girl, but that's never gone anywhere since those are both pointless characters with no real content.
It's a plethora of reasons that bring CoC2 down, not simply ntr. I think the main other reason is the game seems to be made specifically for a futa pc in mind.
The amount of dommy dicked mommies (like evelyn, the one you mentioned) which is content that literally only suits female or futa pc's. Like "please have this content", but also make it so the pc can actually dom them? Even TiTS has this issue with bothric quadommes. That would fix most of my issues with the game personally. I like Evelyn and I wanna dom her as a male self insert pc.
Also just try exploring (not sure if you need cait in party) Hawkethorne streets and you will find Cait having just finished being fucked by a random dude that brushes past you. That's the easiest borderline ntr scene to find. But I don't have an issue with that side of Cait personally, she tell you she is a massive whore and spreads herself for her god from the onset of your relationship. I like her scenes but I don't care to hear the million other guys and futas that dicked her. Imagine you get a steady fuckbuddy only to hear that she is getting dick elsewhere constantly and even during the scenes. You'd eventually get tired of hearing it, unless you specifically are into ntr. Even Kas who keeps banging the whole world isn't as "ntr focused" as Cait.
I love Brint, and wouldn't call his scenes ntr. It's sharing but it's well done. Brienne is the real shit though, best girl is cow girl, I just don't like the way you get her.
I don't like Ryn, Ryn feels poorly written in general, I don't even undertand how people like Ryn. She doesn't feel like a girl at all even though she seems to identify as one. She was written like a femboy and trans at the same time, which never works. I feel like if they either wrote ryn as full femboy or full male to female trans or even full female (a guy can dream of having a female elf companion they can fuck, which is ridiculous that this game doesn't provide), it would be soooo much better.
As a mostly straight guy who likes to feel as the dominant partner in most situations I don't feel like the vast majority of the game's content appeals to me personally. Imagine how it would feel for a 100% straight guy?