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 can I say - she did a great job! We had a couple of ladies in our group who thought that it was much easier to pay in kind to the professor than to be up all night cramming incomprehensible formulas and dates. But here, as they say, it is a matter of what you learn!
i'd fuck her all over the place