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.
The lips are certainly working and very experienced, but the breasts clearly do not want to show. Judging by what was visible in the neckline of the blouse - it is clearly lopsided.