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.
Kudos to that mama. In my experience - not everyone is able to show herself well in the cowgirl position, and this one worked her ass off to perfection.