It means - Having ran out of a saree to wear, she goes to her aunt's house to borrow one, but finds her aunt wearing leaves of eecha maram as a dress.
my-wife: "Naalaikku snow storm, aathla paal kammiya irukkey, pakkath aathu Lakshmi kitta kekkalaama?"
There is a knock on the door and we open it to find pakkathu aathu Lakshmi.
pakkath-aathu-Lakshmi: "Hey, actually we have ran out of milk, can you spare some milk please?"