The sun is finally out today. So of course Penelope is going to lay out in it naked. Right on time to interrupt her is the step brother, pretending to need help with his homework. She will play along cause she needs someone to help oil her back and ass. She quickly notices the rubbing and touching is making her brothers pants tight in the crotch area. Being the good sister she won't leave him with blue balls, and she is in the mood for anal! She lets him fuck her tight asshole out in all the right positions, trying to see how deep he can go. Then she lets him drain his balls on her face. On top of all that; she is still willing to help him with his homework.
