After greeting Siobhan, Yvette pulled out her wand and pointed at Siobhan's back discreetly. "Here -- this'll get the dust off," she said, and the pureblood girl was slightly wary of how badly a Muggleborn could muck up with magic. Even so, she didn't say anything as the brunette's muttered spell didn't seem to cause an adverse effects. Slyly, Yvette noted in a low, secretive voice, "Made up with McCarthy then?" Siobhan's cheeks burned red but found herself completely unable to lie, especially when Yvette's eyes sparkled like that. She only managed a nod, her friend's answering giggle -- or cackle -- saying it all. Slughorn began to drone on and on, first about potions -- the next one they would be making was the Forgetfulness Potion -- and then discreetly changed the topic to his own get-together and how prestigious all those involved were. Siobhan tried to catch Kyle's attention and roll her eyes.