Yeah I've skipped 4 full weeks. There's some kind of glitch where she's both in maternity and pregnant at the pizzeria. And if you click on her in maternity she shows up as the final stage pregnant like she does at the pizzeria with corresponding dialog. I'm going to try to delete the game folder and uncompress from the original.At least ~3 weeks in-game is normal. Unless you skip over a month at a time and nothing changes, it's working as intended