You place your moms hand on your dick
From Create Your Own Story
Taking your Mothers hand, you pull it down to your boxers. At first she is reluctant so you grind your dick into her hand. Feeling how big you are she gasps and puts her hand in your boxers, grasping you, she slowly starts stroking you up and down. "You're big, Timmy." she says in your ear and starts stroking faster, with no answer you reach back and grab her ass.
She continues jerking you off and you squirm more and more as you are about to cum. You feel it building up and you let her know with your quiet boyish moans. "Cum for Mommy." she says in your ear, quickening her pace "Cum for Mommy." she repeats and your body goes stiff "Cum for your Mommy."
You spray your seed in powerful streams, making a mess of your boxers and coating your mothers hand in cum. "Good boy." your mother breathes into your ear as she kisses your neck and releases your cock. You drift off to sleep as your mother licks you off of her fingers.