The chattering teeth was, yes. The bit about the ?real reason? implies that you were stating Oswald not wanting Marina to see what he was doing as if it were a factual statement. You?re backpedaling.
The 'real reason' is clearly a part of the tongue-in-cheek nature of the OP.
And you stubbornly remain incurious about any investigating for cause, an arguably persuasive cause... and in plain sight.
