what you planning to add
So for the tech part, I have to figure out how big I can make the eggs/opening to avoid clipping. It has work well with all the other systems I have going on, pregnancy, cosmetics eg.
For gameplay I haven't really decided yet. Maybe they need to stay inside for some time before they are ready to come out
you can make it so that she gives birth to eggs, they hatch over time (or instantly) and from them appear mini versions of Mother (possibly with tentacles behind their back (Tokyo ghoul)) or she gives birth to goo (what she does next, there are many variations from the goo simply becoming a new type of manipulator to the goo replacing Mother)