This game uses the porn approach to sex. In other words, there's no need for stuff like lube. If it helps, imagine that Primrose's breasts are lubed in that scene. The same goes for things like anal scenes.
But I get it. You don't get off from boobjob scenes. That's a shame for you since you obviously didn't like the main scene from that update, but it won't change anything in the game itself or in its development. I just want to make that clear. It would be pretty amazing if everyone liked all the kinks games like these explored all the time, but that's just not the case. I explore lots of different concepts in this game, and it's not always going to be up your alley. That's fine. Just move on and let others enjoy the scene. There will be other scenes in the game that you are likely to enjoy more than others, so it goes both ways.