Horny little sister seduces brother into bed

You got to your room to sleep, but when you turn on the lights you realize your bed isn't empty. Your younger sister lays there, giggling. "I can't sleep. Can I sleep with you awhile? Just come to bed!" You don't get into bed immediately, so she has to beg with you and tease you even more. She pushes her hand into her panties, playing with her wet pussy. You can see how badly she wants you. "Please? Just come to bed. I won't tell anyone." She pulls on her nipples, and cups her soft breasts in her hands. Before long she's rubbing her horny little pussy, begging you to join in. You watch as she shakes and moans when she brings herself to orgasm in your bed. How could you resist it any longer?