Princess Serena gets easily bored and when she is bored, she likes to do crazy things. She made this loser lick her feet as well as her ass. She had pooped but she did not wipe her butt properly so that she could use it to humiliate and degrade the slave. She liked how he was degraded and humiliated at being made to lick and smell her ass that she resorted to do it again to someone else.