This old guy thought his age was a ticket to do whatever he wanted. It worked for him but not with these mistresses. They never cared who someone was. As long as he or she pissed them, he or she had to get what was due to them. When they assessed this guy's mistakes, he was made to lick their boots until they were clean then he had his mistakes forgiven.
Madame Marissa and her friend are both very competitive mistresses. They were competing to see who would win and when madame Marissa won, she got her friend to lick her boots. They had agreed that the one who won would humiliate the loser in whichever way she wanted. Her way of doing it was to get her boots licked clean by her friend and it was fun for her to watch.