Severus exhaled, frowning, when Amelia ducked her head. He'd embarrassed her again, and he was starting to feel awful once more, though also a bit relieved that his erection finally appeared to be subsiding. Thank God. As long as he didn't -- No! No looking at her chest, eyes, he silently chided himself. Book, notes, and face only! And no fantasizing about it, either! he added, when his thoughts once again started to drift that way. Well, being an Occlumens occasionally had its advantages apart from fooling egomaniacal madmen into believing one were loyal...
As long as he didn't revert to inadvertently ogling her again, he ought to be back to normal before long at all. "Glad I could be of help," he answered in response to her thanks, giving her a small smile. "So, before we got sidetracked onto the Pritchard Scale ... do you think you'd be able to recognize belladonna well enough?" he asked. "I know the illustrations Professor Sprout puts on the blackboard aren't always all that helpful."