To send a message to this guy, this mistress forced the guy to lick and smell her stinky socks. He had wronged her and he had to be punished. So she asked him to sniff her socks and at first he refused until she told him what would happen to him if he did not do what she wanted him to do. He agreed to do it as he did not want to experience her wrath.
Goddess Gabriella wanted to try things she had not tried in a while. That is why she chose to use her socks to dominate this loser. She did not care what the guy thought about her and she did not care about what the guy felt. All that was in her mind was that she wanted her socks sniffed and smelled as well as licked by the guy. That was all.