Mistress Melanie gets on the table on all fours and sticks her naked ass right into the slave's direction - she orders him to lick her asshole und crack clean! She even spreads her ass cheeks with her hands to make sure he doesn't miss a single spot while licking her ass crack.
This mistress wants to compare her slave's dick to her huge strapon - of course he can't win this competition as the strapon is 4-times the size of his dick! Now she'll show him what a real dick feels like and fucks his dirty ass with the strapon. Do you think he understands the size difference now?