A submissive in chastity is bent over, hands bound behind their back, as their mistress teases and taunts them. She runs her hands over their body, tracing the outline of their chastity device, before slipping a hand between their cheeks. She spits on her fingers and rubs the saliva around their tight hole, making them squirm in anticipation. With a wicked grin, she pushes two fingers inside, scissoring them to stretch the muscles. The submissive moans, their body tensing as their mistress increases the pressure, adding a third finger, and then a fourth, fucking them hard and deep until they're begging for release.