2T4U/Jack/Morning/Mel's room/F-Mel-Missy/Explain while sticking it in
“Me and Mel here were doing something called sex,” you say to the spread-eagled and bare-pussied first grader. “That's when a boy and a girl put their privates together like this,” you say, dragging your comparatively giant teen-aged and fully grown dick through her tiny elementary-schooler labia until you find the entrance to the six-year old's vagina. “And then the penis goes inside like.... thiiis.” You continue with a little bit of concentration in your voice as you begin to push forward against her tight little entrance and nothing happens. You give a nervous laugh and smile up to the tike as you try to penetrate into her tiny little pussy. You take hold of your dick with one hand, and her hips with the other, and then you try again. “Err... like this.” You say again and begin to push once more. You feel a great deal of pressure against the head of your penis, and a very nice and warm cushy padding of little girl flesh against the tip, but you are making no head-way.
Your shoulders sag a little as you look about the room at all the expectant faces, the faces of your eight and six year old little brother and sister look on with silent curiosity and wonder, while the face of your 14 year old and just fucked sister seems to be looking with something more akin to disappointment. Before things can get more awkward though, your wonderful and sexy geek of a freshman sister comes to the rescue, reaching down over Missy's body and spreading her legs apart with her wrists. She grabs the very tip of your dick with the pinkie and ring-finger of both hands. Meanwhile, her thumbs and fore-fingers prod around the elementary schooler's labia and begin nestling into the edges of her little vaginal entrance. Mel then looks back up to you with a shy but mischievously approving grin and a slight nod as though to give you the go-ahead. Seeing what she is doing, all you can do back is to nod in return as you lean your body down and wrap both of your hands firmly around your little elementary-school sister's thighs and push hard into her with everything you have.
With everything set like this, you are easily able to get the leverage necessary, and with your dick still slimy from the cum you pumped into Melony, you slide right in to your little sister's entrance and then once you are past that initial resistance you bust past her virginity and bury half your cock inside her in a single stroke. Missy's eyes widen in shock and she takes in a ragged gasp. Realizing what is happening faster than you do, Melony's hand shoots straight up and clamps over your little sister's mouth right as the kid tries to shout into it in a mumbled screech.