The woman grinned noticing that the girl was actually enjoying it, standing up she figured it was time for more drastic measures with this girl. Walking to her medicine cabinet she took out one of the special medicines she had in a storage, it is made to not let girls cum no matter how turned on they were. Walking back to her she pushed the needle in her butt and pushed the liquid in. Grinning she walked in front of her and said, "What I jut injected you won't allow you to cum, no matter how much you beg, no matter how much you cry during the next hour you will not cum". Grinning she turned the vibration on the plug on and then pushed a vibrator on her clit and turned it on high. She knew the best torture for a situation like this was making her unable to cum and always be on the edge. Grabbing the paddle with her free hand she continued to spank her ass, the harder she spanked the deeper the plug went in. She grinned knowing that it won't be long before the girl would be begging for mercy.