As you lay there unable to sleep due to your horny stepsister, your heart races with anticipation.Your eyes widen as you feel her silky hand slide up your leg and underneath your clothes, revealing your firm and round ass to her eager gaze.Her lips curl into a sinful smile as she teasingly whispers great fucking.You groan louder now as you sense her fingers sliding in between your cheeks and massaging your tender flesh before making their way down your crack, stopping only momentarily to slide through your tight sphincter and back out again.Your muscles clench uncontrollably as you moan loudly, finally giving in to your desires.Within seconds, her body is over you and you feel her weight settle heavily upon yours.Your dick twitches instantly as you hear her moan through the air, her face buried against your shoulder as she rides you harder and faster, the sensation driving you wild with pleasure.You wrap your hands around her hips as she bounces up and down, never once losing balance, never once giving you a chance to catch your breath.Your mind races, consumed by the intensity of what is happening, but your body cannot deny it, so instead, it relishes every single touch.Every thrust, every stroke, every move drives you further towards orgasm, and it feels like you are almost there, tantalizingly close to your release.And as if sensing your inner turmoil, she leans over and grabs onto the base of your dick, squeezing gently as she continues her assault on your sensitive hole.You gasp and thrust harder still, feeling her hot pussy contract around your cock as you both climax together in a torrent of passion and ecstasy.The sound of the door slamming shut is lost in the thunderous roar of pleasure that shatters through your body, leaving you breathless and exhausted, but more than satisfied after the intense workout of being the great asshole of your stepsister's stepsister.