Mycroft is in good shape, but you wouldn't know it from the way Sherlock talks (and he's nonsensical anyway).
Sparring
"And how did the case go?"
"Fine of course, as soon as Lestrade contacted me."
"I thought that your vanity might be subdued once you hit university, but clearly not," Mycroft noted dryly, reaching for a sugar packet to pour into his mulberry tea.
Sherlock's eyes followed his brother's hand. "How's the diet, Mycroft?"
Mycroft's hand subtly switched directions and snatched a packet of the low-fat sweetener instead. "Mummy wants to know if you'll be back for the weekend."
"Tell her no."
"She thinks it's a good idea."
"Then tell her no twice."
"What is that supposed to mean?"
Prompt was #69: mulberry (has anyone ever had mulberry tea, out of curiosity?)