[that would be a very small school, unless you wanted to let his siblings in as well, and that's just a whole other issue...]
I was not aware that you had a sister. [he might be a bit derp about the nature of such protective relationships, but he knows when someone is intending to sound even vaguely threatening.]
no subject
I was not aware that you had a sister. [he might be a bit derp about the nature of such protective relationships, but he knows when someone is intending to sound even vaguely threatening.]