The partner is fed up with the usual caresses and he wants something special. And the obliging bitch has found a new trick - she jerked the man's anus with her tongue. The brunette does it so beautifully that I myself from a thrill rushed! And the guy probably responded appropriately - pimped this slut's ass. Such a girl is very valuable - you can trust her most intimate things.
Yes, I think the bartender himself was not against getting seduced for a fuck like that, because it's not often he gets all sorts of strangers sucked, though most likely he then gave her a wonderful cocktail, but the beginning of the payment we see now.