I think it would be kind of cool if the oviposition bulge expanded the sides a bit more since the slight dip makes it a bit annoying for me since she's getting pregnant, and in pregnant people that dip isn't something I've ever seen.
Granted, I'm not a game designer or 3D modeler by any means, so I understand if filling out the dip isn't possible.
Overall, I really enjoy this game and cannot wait to see further updates!