We don't even know--nor does Sirius--if that was why Snape was staring. He could have just been sneering at Lupin's childish behavior, or idly wondering if Lupin would catch the parchment.
But yes, Sirius will jump to conclusions, and he won't be happy about it.
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branchandroot
(no subject)
Date: 2006-09-20 07:32 pm (UTC)But yes, Sirius will jump to conclusions, and he won't be happy about it.