Ok, I launched the game, went to the gallery, and replayed the event... only to realize I do not remember this event at all (yet it was unlocked)... not quite sure why. Anyway, you are correct on the fact that there were a lot of "babe"s thrown about, and it does feel odd coming from Naira. I think something more traditional would be more at home in her dialogue, like "honey" or something. Although, if I may adddress your little "especially in public" comment, shy people are not shy forever 100% of the time. Their relationships also develop and grow and as they become more comfortable with somebody, and using pet names in public becomes just as natural to them as to more confident people. It just takes more time.
Oh, and they went roller skating.
I quite literary have no idea where you're getting this take from. Are you sure some projection, or bad irl experiences are not bleeding through for you here? Because I never had this feeling about Velle's early interactions. "goading" the MC, sure - she was teasing a lot. "demeaning", though? Nope. Not even a little. Even the "show the difference in their experience" point you make doesn't totally sound right to me for this. And I still do not see the problem with Velle calling MC "babe", and in the latest scene, it felt quite natural to me, considering her character, and the relationship they had so far.
You... u wot m8? Seriously, you're on a forum that showcases games with tags like Incest, Mind-control, Tentacles, NTR, and even Bestiality... and this is the place you've decided to kink-shame at?

On a more serious note - I guess you simply do not understand anything about BDSM. I'm not an expert by any stretch of the imagnation, but I do know that there's more to that than one person enjoying delivering physical abuse, and other enjoying receiving it. It's all about the ability to deliver a mix of sensations. So if a guy likes being a sub, and gets that from someone he enjoys doing it with, all I say is "gratz dude".
Again, you are assuming that the guy doesn't want to be there. Are you under the impression that mind control is heavily at play here? Cause I see no evidence of that. Also, Velle has expresed a level of distaste regarding how ravenous (for lack of a better word) some of her kind can be. Hell, she straight up says that she does not follow her mother's teachings about getting as many men as possible, as often as possible to gain as much power as possible. That kind of implies that Velle only takes as much as she needs, so the guy was not likely "getting the literal life sucked out of him".
Don't get your panties in a twist, babe.