Prompt: Impervious
Disclaimer: Harry Potter does not belong to me
It was only due to his quick, battle-trained reflexes that he managed to duck the Bat Bogey Hex as he walked in the front door.
"You great prat! I hate you!" Ginny's voice echoed from down the hallway. Harry quickly silenced his feet and disillusioned himself. He crept through the kitchen and came up behind her. Wrapping her in a hug, he calmly asked "What's the matter love?"
She elbowed him.
Hard.
"I'm pregnant again!"
"Well, it's not my fault that even the great Harry Potter can't cast an Impervious that's effective against the legendary Weasley fertility." He answered innocently.