Once upon a time, my cock didn’t fit inside my little sister’s…

Once upon a time, my cock didn’t fit inside my little sister’s pussy… but now, after weeks of training several times a day, she can swallow me right up. She’s still so incredibly tight, but arousal and training gets her to take me right to the balls, so my cockhead can pump its incest seed right into her cervix and waiting womb, where it belongs.