confusion

can anyone plz explain y dev's mother calls maan chhote-saab? dev and maan doesnt seem to be siblings....another thing is that head of khurana mansion is supposed to be dadiji....then what right maan had to kick out dev from the mansion.

even if dev's mom is maan's stepmom....then also y shud she call her chhote saab. only servants call by that name. i am really confused....plz someone explain.

we r also in confusion.........i think dev's mother is his step mom n maybe a servent n maan's father fell in luv wid her after d death of maan's mom..............thts y she call maan chote sab n maybe she used to call maan's father barai sab as a servent say

my take on that