Mistress is relaxing on the sofa in her sexy black catsuit and thigh high pvc boots. 
She summons her boot bitch slaves into her domain... they crawl towards her ready to fulfill her every whim.
"Clean My boots with your tongues slaves" Mistress instructs them to polish her boots with their tongues.
She humiliates them by making practice giving pleasure to a woman on her sexy boots and laughs as they do their best to comply! 
Clean them and then I'll rest My boots on you while I relax!