2T4U/Jack/Fuck Tiff
Your three-year-old sister has a dreamy look on her face as she rides your stiff cock and you are in danger of cumming if she keeps going. "Tiff?" She keeps sliding back and forth. "TIFF?"
"Uh! Wha..."
"Do you want it inside?"
She opens her blue eyes wide and stops sliding. "Okay. If you want."
You know you shouldn't but the thought of getting your cock into her immature little cunny (Even though Bandit beat you too it) is overwhelming. "Stand up," you order and she, a little reluctantly, gets up and stands astride your legs. You hold your cock pointing up and she shuffles forward until she's right on top of it.
"Just lower down when you are ready," you say.
At first, it's just pressure on the end of your cock, but there is plenty of lubrication, so it slides between her cunny lips and into the entrance of her vagina without too much trouble. You hold her hips to steady her and when you look up at her face, it is a picture of absolute concentration, with the pink tip of her tongue poking out.
If you thought that after being knotted by Bandit, she would be easy, you soon learn better. Her cunny grips like a vice and if it wasn't so dammed erotic, it would be painful. She starts bouncing - only a fraction of an inch, but each time she comes down, she takes a little more cock. Your knowledge of anatomy is pretty sketchy, but you have fucked girls three times Tiff's age who could only take half your seven inches before bottoming out.
You grit your teeth and try to think of a distraction to stop yourself from cumming, as she engulfs more and more of your shaft but it's too much. You wrap your hands around her waist to hold her still as you pump a few million incestuous sperms into her vagina on a hopeless quest for a fertile egg. She laughs out loud as she feels it pumping and you carefully lift her up and lay her on your chest. You both lay still, panting and relaxing.