soberloki prompted me with Snape, Aberforth: a Muggle encounter.

Having Truck with a Muggle (PG; Aberforth, Severus, Tobias; 100 words)

"Why'd you drag that in here?" demanded Aberforth.

"Please," Severus panted, holding up a badly beaten man, "hide him . . . here. I'll pay . . . you."

"I don't have truck with Muggles."

"But he's . . . my father!"

Aberforth drew his wand and spelled shut the door before turning it on Severus. "How'd he come to be here . . . in that condition?"

"He followed me, and my . . . friends didn't appreciate his . . . trying to make me . . . come home."

"'Friends'—Death Eaters you mean. Go out the front and leave him to me."

"No, I—"

"Lead 'em away. I'll patch him up. Come back for him when it's safe."