What in Jesus H Christ's name are you even on about?
Lore-wise, MC controls the tentacles and has full control over who does or does not get tentacled, with one single notable exception:
It isn't even close to "sharing" content as one would normally define it. If it were up to me, I'd define it more like "wriggly dildo content". But honestly, if tentacles bother you then this game probably isn't for you, since the breeding-little-tentacles mechanic is kinda central to how this game works. It's not mandatory, but it's a fully functioning game mechanic with lots of thought and coding hours behind it.
And finally, having played introspurt's previous titles I fully expect this game to fall under some kind of harem definition no later than the next update, since it seems to follow the same kind of pattern as the previous games and the story seems to be setting it up. (Theorycrafting: You amass followers during your adventures and end up banging them. And they are fine with it.)