student asking question

what does "not supposed to be" mean here? does it mean permission?

teacher

Native speaker’s answer

Rebecca

Yes, that's right! Here "not supposed to be" means that they don't have permission to or are not allowed to be watching anything. Ex: You're not supposed to be doing too much physical activity this week. The doctor told you not to. Ex: She's not supposed to see her birthday present! Help me hide it from her.

Complete the expression with a quiz!