How many siblings do you have? Easy question?

In one of our get-to-know-you-games the action was to "stand if you have more than 6 siblings" I then proceeded to ask the students standing, how may siblings they had. One had 10, another 6, then when I asked the next girl standing she said, "I have no idea" and tried to count, then she said; "just take my word for it I have a lot! " Then another student suddenly stood up. As I looked her way she began to explain... I didn't know you meant my siblings from both my parents!