As Mary walked through the city streets in her open shoes, her feet got covered with dust with tiny bits of street grime clinging to her soles. When she returned home, she didn't bother taking her shoes off and instead ordered her foot slave Alex to give her feet a nice tongue cleaning. After carefully taking her shoes off, Alex slowly cleaned every speck of dust off every part of her soles - arches, heels and between her toes. Driven over the edge with the smell and the taste of soles of his mistress, he finally came over her pale, smooth legs.