Slavery: A series of erotic games (Book 03)
"If she loses concentration on her Domina's pleasure as she's punished. You may add another ten."
Julia was well on her way to her first orgasm when I started spanking Rhonda. I whacked her hard the first time, but other than whimpering after, Julia didn't appear to be neglected at all. I loved, Rhonda's bottom. To me, it was one of the most perfect asses I'd ever seen, let alone spanked. Firm, muscular, shapely, and totally hot. I moderated the next dozen to something less than the first one, but started increasing the severity slightly from then on, seeing if Rhonda would break. Towards the end, Rhonda started patting Julia's tummy.