Katara gave a polite bow. At the girl's stammering, Katara decided to help Negi along. She HAD done this for his benefit, after all.

"It would be the height of foolishness to turn down such a polite invitation, don't you think?" She said gently with a hint of sternness in her voice. "Negi thinks highly of you. Why not take his invitation?"

Ah, matchmaking, even in the Sensorium, yielded to Katara.