Work Text:
Sherlock thumbs the indentation encircling his brother's left ring finger. Annoyance pricks him, but his voice is neutral, almost bored. "Why remove it every time, if it means nothing to you?"
Sherlock feels laughter rumbling below him, like rocks tumbling off a cliff. "You are beginning to sound like a jealous mistress, Sherlock." Mycroft locks their fingers, presses a kiss to Sherlock's knuckles.
"If anyone is your mistress, she is."
"Mistress implies interest, Sherlock."
"Well," Sherlock frowns. This conversation is going off tangent. "But I am not your mistress."
"You are, however, as you so astutely point out, my interest."