Draco had other plans. Once she had cleaned him off, Draco pulled away from her. Getting out his wand, he cleaned the evidence of his orgasm from his trousers and his hand. He smiled appreciatively at Pansy for what she was offering but he had to have this be all about her.
His confidence had been thoroughly shaken after his encounter with Millicent.
"Later, love," Draco assured Pansy. "We need to get to class anyways, we are going to be late." Lunch was surely almost over. Reaching her for her hand, he took it and helped her up feeling chivalrous.