Silly doubt

Someone plzz clear my silly doubt.
Whether Sam is elder or younger sister of Roshni?
I remember in 1 episode mona bua was telling to shabnam that consider Sam as her younger sister. So whether she is younger to Roshni. But she looks like an aunty of Roshni.

no idea😆 i think elder

sam is elder..coz when roshni had slapped sam earlier they made a fuss of her being younger to sam!