better details of sex and pregnancy in general, live birth as well as egg laying. maybe some offspring that can "attack" her too. Pregnancy stages (no belly, small belly, big belly).
also improve overall navigation of areas. Right now it feels tedious to get around. Checkpoint system with teleporters would help a lot.
Please please please don't do "fetish soup" with this game though. It's so horrible and annoying that every game wants to have EVERYTHING. Vaginal, anal, oral, paizuri, tentacles, gang rape, dirty/smell, ahegao, etc etc etc etc etc etc etc and then you have a game that has 1 sample scene from every fetish. Please focus more. choose a FEW fetishes and do them well. You already have vaginal sex and pregnancy. Good starting points. Explore those more and make "feature complete" before you add ANOTHER fetish. Then when you do add another fetish, please add it carefully and make it "feature complete" too. That way the game is very enjoyable to a defined target audience instead of disappointing everyone equally.