Mycroft's true intent of visiting Sherlock and his warrior.
Welcoming Brigade
"You never answered my question."
"And what was it, dear brother?"
"What. Do. You. Want?"
"Mm, your manners are still a little rusty, I see."
"If you're just here to bother me and John, I swear I'll—"
"Ah, yes, John!" exclaimed Mycroft in delight, turning on his heel to the considerably shorter barista, who started in alarm and backed into a table. "Just wanted to welcome you to the family."
"To the what?"
"Figuratively speaking, of course." Mycroft held out a hand.
"So…when you said you 'worry about him constantly', you mean you really worry about him?"
"Yes…constantly."
Prompt was #98: Writer's Choice: rust
Am I taking John and Sherlock's feelings for each other too quickly...?