a/n: This plot bunny jumped on me at two in the morning and demanded to be written. IDEK. Not beta'd, as usual. Characters are not mine—they belong to ACD and the BBC. Any and all feedback is loved!
Most of the time, Moriarty is the one in charge, Moran the subordinate. Once the door of their bedroom closes behind them, however, Jim allows Sebastian to take control.
"On your knees," Sebastian commands, and Jim goes, hands resting on his thighs, eyes lowered, docile, vulnerable. He allows this for two reasons: firstly because it keeps Sebastian's loyalty firmly tied to him, and secondly because Jim likes not having to think for a while. He likes the pleasant, easy calm that fills his mind once the door shuts behind them, and he likes the feeling of complete safety that wraps around him like Sebastian does afterwards, when they're sleepy and sated.
Outside of their room, Moran would never dare give Moriarty an order, and Moriarty doesn't think twice about tossing commands at Moran. They are purely employer and employee, criminal mastermind and faithful minion, and that is as is proper, outside.
Once the door closes behind them, Sebastian snaps out orders and gently holds Jim's wrists down and fucks him, sweet and slow and careful, like Jim's precious and delicate, a spun-glass suncatcher or a fragile wineglass. Jim obeys orders and squirms slightly under Sebastian, just to make sure he knows who's really in charge here. Sebastian's fully aware that things are this way only because Jim allows them to be so, and he finds he likes the trust Jim gives him. It makes him want to be worthy of that trust, to protect Jim, hold him close and whisper endearments in his ear, take him apart and put him back together again.
Most of the time, Moriarty is the one in charge, Moran the subordinate. Once the door of their bedroom closes behind them, however, Jim allows Sebastian to take control, and neither of them would have it any other way