The chick is used to being treated this way. The impotent husband lost her at cards. That's why they've been pulling her like a bitch all day long. And the harder the stake, the harder they drive it inside. Only the pussy is already so used to the new masters, to the abundance of milk - that she does not want to go back.
The blonde was lucky, the guy was a licker. First he licked and then he cleaned her pussy with his dick. Either the erotic outfit helped, or the guy was in the mood.