Wait, I've got it! (woo)

She is pointing to her eyes, in referance to the lyrics of the song "Eyes on Me". ("I kind of liked it your way/How you shyly placed your eyes on me"). She is telling Squall in her own way that she is looking at him. And when (SPOILER)she does it again at the end , she is reminding him that " . . I had mine on you".