Sheri pressed forward again, sliding a leg between those in front of her, pressing her thigh upward to feel moistness. She nuzzled the neck, kissing it, nibbling on it, while her hands explored the back of the woman who had controlled her so completely for the last week. One hand traveled down and cupped her ass, squeezing softly, feeling the smooth fullness, moving over and running down the crevasse, her fingers brushing against the pucker there. She felt the Mistress push down on her shoulders, guiding her face to the twin mounds, where she moved her mouth, seeking out a nipple, suckling, while her hands searched out the secrets between her Mistress's legs. She was leaning over, moving from one breast to the other, taking the nipples in her mouth, sucking, dragging her teeth gently across them."That's enough, I think." The Mistress's voice had a strange sound to it, and it excited her. Sheri stood. "Thank you Mistress. You are too kind.""Were you about to bite my nipple, girl? Get a little payback?"