Challenge: mythbusting: Harry Potter's father
Word Count: 100
“Your what?” Severus could scarcely make his jaw work long enough to speak.
“That's what it's claiming.” Harry Potter, still short, still annoying, still unacquainted with good grooming, held out the offending book. “That my dad was sterile so Mum asked you to – help when she wanted a baby.”
Severus finally managed to make a sound that wasn't an obscenity. “Your mother asked me to brew a potion that would protect you in case she was – how do I put this - “
Potter waved his hand. “I don't need details. How do we stop this?”