The way I see it, the chick isn't particularly attractive. Belly in ugly folds, stretch marks on her thighs, lopsided ass. Except her breasts are attractive. I can't tell you how it is in the front, but you can see how fucked up her anus is. So realistically, the lady's working mouth is kind of attractive, nothing more!
Any chick loves it when her pussy is licked. And this brunette found a loose tongue from her brother. Naturally, for such services she had to pay the full price - to take in her mouth and let her slit put on his dick. I can only see that she enjoyed it. And to feel like an actress being filmed and licking at the sight of her vagina and cum on her lips - she just enjoys it.
I want to have sex.