let me rephrase the last update!

What I meant about every month is the, each chapter, Nico enter a new month of pregnancy! So, like

Chapter 4: month 1

Chapter 5: month 2

Chapter 6: month 3

Chapter 7: month 4

Chapter 8: month 5

Chapter 9: month 6

Chater 10: month 7

Chapter 11: month 8

Chapter 12: month 9