Mistress Mini and mistress Nikki wanted to have fun at this guy's expense. So they flirted with him and he fell for it. The guy was made to admire their firm and sexy boobs. He loved what he saw and he wanted to touch them but he was not allowed to. Instead, the mistresses spat on him and lie to him that it turned them on when someone licked their saliva.
This loser did not know his place and these mistresses felt that she needed to do something about it. The mistresses used saliva to teach him a lesson and it was a lesson he did not have a choice but to learn. He was forced to open his mouth and the mistresses spat into it. He tried to refuse but he was told that there was a worse one waiting for him so he complied.