Miss Marie lent Graziela her high heel boots so she could abuse her slave's balls. She kicks him in his dangling nuts and grabs his cock between her high heel boots and starts squeezing it. The cock is pinned between the boots and looks like it's about to burst. Graziela abuses his nuts and almost wears out Miss Marie's boots using them to punish this slave's cock and balls.
Mistress Marie has a slave who lets her torture him with ballbusting any time she wants because he loves to feel her feet and boots smashing into his cock and balls. This time, she wears some high heel boots with spiked high heels and his cock and balls start swelling up and look like they are about to pop as she steps down on them hard for some painful ballbusting.