Rita's heart skipped a beat as Professor Merrythought spoke to Bellatrix. Her eyes went a little wider fearing she might suspect their note passing! Merlin, that would be bad if she ever read even what they had passed so far.
There was only one solution...
Rita's hand drifted down below the desk and her fingers curled around her wand but she didn't draw it.
When she realized what was happened, she had to fight the urge to breathe a visible sigh of relief. Rita's expression became a bit smug when she was mentioned in a positive light. "It's all right, Professor," she offered. "It's not distracting, I find your lecture fascinating today." Merlin, please don't let the professor ask her what the lecture was about!
When the attention was off them, she actually did breathe a sigh of relief. Taking the note, she grinned again.
Did I watch? How do you know? Besides, who could resist watching a prefect break the rules?