She bit her lip to keep a moan from coming out, and as if sensing it, he moved his other hand up to hold the back of her neck and then gave her a particularly hard thwack right on the bottom curve of her buttock. Her whole body jerked, her bum jiggling from the impact. She gasped, and he slid his hand under her. Right in between her knickers and her pussy. "You like this, my little slut?"