They'll figure it out unless they are determined to be idiots. I hope.

My story about DS revealing that he could read in preschool:

Teacher at circle time holding up the book: Now...what do we think this story could be about?
DS: Well, it's called (Title of Book), so I think it's about (subjects mentioned in title).

Fortunately the teacher a) realized what was going on and b) thought this was hysterical.