A/N: just a thought I had.
Sam stood beside Dean, facing Crowley and a woman he'd never seen before. She was a tiny thing, shorter even than Crowley.
"Who's this?" Sam asked. Demanded.
The tiny woman snorted.
"And who would you be, y'bawheed?" She demanded back in a thick Scottish accent. She took a step toward Sam but Dean warned her back with a gesture.
"Rowena," he said, saying the name like it was a bad taste. "She's – "
"Are introductions really necessary?" Crowley asked. Sam thought he seemed nervous and he assumed it was because of Dean. Until Dean finished his sentence:
"She's Crowley's mother…"