The Knight was caught between Janette's metaphorical jaws, and she'd sunk her fangs in to keep him there.
Janette wanted to just say "SCORE!" but it would have been inappropriate, and probably would have revealed her true intentions.
"Thank you, Sir Killian." She used the formal title, only to make him feel more nervous than he was. The more nervous this knight was, the more she would enjoy taking the kiss from him.
"I'm only here until I go to meet a fellow noble, who has a guard, so if you stay with me until I have to go to that, then I'll go straight there, and meet with him." Janette's intricate web of lies would no doubt tangle her up later, but in the state she was in, she just wanted to meet her ultimate goal with this knight.
"In the meantime, please, come and sit." She would make him squirm, then at the goodbye, she would bite.