Kylie was a little hesitant, she didn't want Professor Lupa to think she was implying something... she was merely curious..

"Well.. I'd heard some talk of something that happened last year. I didn't...well I didn't understand it. I know you must be truly emotional about it, and I really don't mean to intrude or offend you but..well.. did something happen last year involving you and the headmistress? I simply don't understand. I really don't mean to offend you or anything..." Kylie was quite nervous. She wanted to know and she didn't know anyone else who might. She just hoped Professor Lupa wouldn't take her question negatively.