Either she's just making fun of Lelouch... or maybe she's simply trying to help him because... well maybe he needs it.
Heck, for all we know it can be as innocent as giving the guy hints that she wouldn't mind being closer to him.
But it's funnier to imagine the second possibility.
*buzzzz*Hang in there!
Vice-President!Hang in there! Vice-President!...you?Oh, thank...And just what do you expect me to use this for!?Sorry, wrong item! ♥*buzzzz*She did that on purpose!