Penny's reaction sent all sorts of alarm bells in Percy's mind, and he was frankly shocked. His body tensed at her touch, but her strangled words snapped Percy to attention. A look at the Cauldron Cake in her hand, and he quickly pieced things together. It had been a Cauldron Cake that he and the lady had eaten, just before lust had overtaken them this afternoon.
Staunchly fixing his resolve, he stiffly moved away from Penny without another word, heading directly to where Charlie stood. Setting his hand upon Charlie's arm to get his brother's attention, he told him, "Somebody's tainted the Cauldron Cakes with a love potion. Penny's been contaminated." He nodded in the direction where he left her, by the food table, without actually looking back. "Go to her."