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.
What an enterprising brother, the other would have asked for money, but this one only needs to put his dick in his sister. And she's not too shabby, she kind of paid off, and kind of had sex for fun!