100-word BtVS crossover with The Sarah Jane Adventures, a Doctor Who spinoff. Major spoilers for both shows.
By Marcus L. Rowland
"It's about your son," said the American girl. "You know he's not real, don't you?"
"He's...?" said Sarah Jane Smith.
"No navel, and you faked his adoption records."
"What are you suggesting?"
"He's a magical construct. Maybe you wished for him, maybe a spell put him there. But he's not real."
"Magical?" she said incredulously.
"I'm here to help," said the girl. "It happens a lot, people get into these things then run into problems. We've set up a support group for the families."
"Without admitting anything," said Sarah Jane, "perhaps I'd better have some contact details, miss...?"