"No, Ron," said Lupin. "Two of you." 

He had stopped his pacing, his eyes moving over Ron. 

"Do you think I could have a look at the rat?" he said evenly. 

"What?" said Ron. "What's Scabbers got to do with it?"

 "Everything," said Lupin. "Could I see him, please?" 

"I don't like where this is going," grumbled Amelia.

Ron hesitated, then put a hand inside his robes. Scabbers emerged, thrashing desperately; Ron had to seize his long bald tail to stop him escaping. Crookshanks stood up on Black's leg and made a soft hissing noise.

Amelia gasped, "and I thought I had a filthy mouth." 

 Lupin moved closer to Ron. He seemed to be holding his breath as he gazed intently at Scabbers.

 "What?" Ron said again, holding Scabbers close to him, looking scared. "What's my rat got to do with anything?"

 "That's not a rat," croaked Sirius Black suddenly.

"What d'you mean -- of course he's a rat --" 

"No, he's not," said Lupin quietly. "He's a wizard." 

"An Animagus," said Black, "by the name of Peter Pettigrew."