Lyburn: "It is a question about national security!"
Basil: "Sorry, brother dear, but I am currently way too busy with a rather curious case..."
Lyburn: "Now we both know that is not true!"
Here we have Basil of Baker Street, and his brother (my oc, I suppose) Lyburn, and Basil being a prick, and Lyburn being annoyed.
Sibling rivalry at its best.