Licking girls feet - RADA - You must lick the sweat off my feet without taking off my shoes

Rada returns home after a date to find her slave waiting at the door. Upon entering, the slave greets Rada by kissing her feet. After dancing, Rada's feet are sweaty, particularly her soles and toes. She instructs the slave to clean the dust from her shoes. Once this task is completed, Rada decides to challenge the slave further by ordering her to lick the sweat off her soles and toes without removing the shoes. The slave, although confused, begins to comply by pushing her tongue between Rada's feet and the insoles of the shoes, while Rada playfully presses down with her toes and heels.