Your sister is so shy... poor thing. But she's also horny. And while she's been away she's been thinking about you. She wants to know what you feel like... inside of her. She can't help herself, but you have to help her... help the poor shy thing know that its ok for her to give her pussy to her brother. Little by little you help her feel sexy as she undresses for you, showing you her tits... and then eventually her pussy... You help her play with herself, showing you how much she needs you in her wet pussy... and then, when she can't take it any more,,, she sits on your cock and rides you as hard as she can like the slut you've turned her into!