Draco yelped again when she slapped him, the pain more distinct and yet the pleasure was wrapped around it, turning the cry into one of ecstasy. Merlin, he would have to discover where she found that potion because this was more intense than anything else. His body was already shaking and his cock was hard and aching, pressing against the fabric of his trousers.
"Yes, Miss Greengrass," he forced himself to say, even though he wanted to demand more - so much more.