So I have been thinking about this for some time. Furry visual noveling editor really needs inflatable lips. If the devs are already planning to create basic oral sex interactions why not do it with big pillowy lips. Or something smaller character appropriate.
The way this would work is to make parts in the character's faces (upper and/or lower lip) inflatable just like breasts or ass and hips. Some soft body physics would work wonderfully. Even some basic texture masks would go a long way.
The problems of implicating this would be the many heads and possible variation and how to make them look good.
Of course here are some references to what I exactly mean:https://d.facdn.net/art/lllllmixlllll/1607996825/1607996825.lllllmixlllll_pink-harrow-bust-1-low.png
Please tell me what you think about it and if it should or should not be implemented!