I've made Mary a different Mary than the Mary I like. And I do like Mary, really. I imagine her to be a good friend to John, the one who listens to all his stories about Sherlock and understands that she has to share her husband's heart with another. But this is a Sherlock/John fic...so those who seemed to be worried about John and Mary coming to fruition, you don't really have anything to worry about, hahaha.
Rivals
Mary peeked in the library, her sharp blue eyes falling on Sherlock's curly head just above an armchair.
"Come in or stay out, Marian," he said with a wave of his hand. She stepped inside lithely, cautiously.
"You've been angry with me." It wasn't a question.
"What makes you say that?" he asked, turning his head slightly.
"'Cos you've always gotten mad when I tried to take things that you didn't want to share."
Sherlock didn't say anything for a moment, but when he turned around, his face was melancholy. "Are you truly attracted to him?"
"And if I am?"
"…I won't fight you."
Prompt was from The Papercut Doctor, and it was: lithe