Tiny taste of Moriarty/Moran. Hope they include Moran at some point in the series.

"I don't like cake."

Sebastian smiles patiently, sliding the cupcake in front of Jim, digging a single candle down into its middle and pressing the ember of his cigarette to the wick.

"You'll like this one."

Jim huffs out the flame dispassionately as soon as it's alight, then tears an edge of the dark cake off in his fingers. He makes a face and tucks it into his mouth, then smiles with surprised delight.

"It tastes like ash." Sebastian grins, and Jim narrows his eyes, taking another contemplative nibble.

"You taste better." He tugs on Sebastian's collar, curling his tongue into his mouth and moaning softly to prove his point.