Mistress Marlena was bored and the only person she could have fun with or rather at the expense of was this guard. She waited for him to end his shift and she invited him back to her place where she had fun turning him into a scat slave. He had thought that he would have fun with her but it ended up being cruel for him and he could not do anything about it.
Mistress Marlena found this guy to be annoying and for that, she had to punish him. She did not care what he felt or what he was going through. All that mattered to her was that she had fun and that is what happened. He cried as he ate her shit but she did not stop or slow down. She went on with her thing until she finished what she was doing.