Netorase. You're sharing the girls but don't lose them.
I'd say it's a gray area. If you share them enough (which the MC is supposedly just doing for the money), then they'll start fucking around behind his back (and you'll be getting no money out of it). Not just with the videos you can get, but also stuff like their responses to how they feel about the antagonist change where they're clearly now into him but trying to spare the MC's feelings. If we say netorare has a jealousy component then the messages from the antagonist definitely feel like they're trying to evoke that and there's just a general netorarey kinda vibe to things (like the recent threesome with the antagonist, housewife, and schoolgirl).
You are completely right though that if you're not into that though you can just say you'd never share them sometime near the start and then never worry about any of that kind of content again. But I do think the game can appeal to people that like netorare over netorase (just saying this in case someone who wants and is looking for NTR stumbles upon your answer).