For parents, their kids will always remain kids and that's why they may feel the need to still protect and baby them. But many parents also understand that when their children grow older, there's only so much they can do for their child. They have to let the child develop their own identity. Archana's identity is tied to Sulochana just as Purvi's is tied to Archana and to Sulochana. These three see themselves in each other and that's why they are a unit against all others. This would actually be touching if they hadn't ruined their own lives along with others!