Truth of the matter is that in today's modern world, many young women go through their pregnancies on their own. They have quick and easy access to doctors, internet and reading material to help them sustain a healthy 9 months of pregnancy without being under direct supervision of an elderly or experienced woman. Phone calls on regular basis to their mothers/mother-in-laws/aunts/bhabhi's etc helps too. But this is a TV show and they wanted to bring in a new character to move story forward and thus comes Chedi's MIL.