Natalie let Maria’s wrists go a few moments after Bianca had delivered the last stroke with the tawse, and she immediately jerked her hands back to rub furiously at her stinging butt cheeks. At the same time, Maria levered herself up from her position bent over the arm of the couch, before Bianca could think about making true her threat of extra strokes. She may have agreed to this, but she was damned if she was going to...