Where is kakak su?

Today while I was reading to Ashley, there was a picture of five people. One man, one woman, one boy, one girl and one baby.

Ashley: Who are these people?
Viki : I pointed and said " This is Papa, this is Mama, this is Jayden, this is Ashley and this is baby Hannah"
Ashley: But where is kakak su!!

PS: Kakak Su is our domestic helper!