Teaching Thomas

4th year. The Founders are back, searching for some artefacts in a race against time- and Dumbledore. Sirius becomes an unwilling helper in their plan, being de-aged and forced to attend Hogwarts again. Voldemort suspects that there is more to the Founder's reappearance, which Godric cannot allow- now Tom is forced to bow down to his teachings. Father/Son, H/C, WARNING: SPANKING/CP