After arriving back to her dungeon after her party it's time to reinforce the place of her rubber slut. Mistress Justine Cross takes her slave Britney to the cross where she's shackled to it. She then goes through various implements using them on the latex whore's ass. She builds up to a nice metal crop before she ultimately decides to just leave her chained and whimpering. It's Part IV of "Yes Mistress"