"It won't be a betrayal. You are the most faithful man I know. You're bi. She understood our relationship, and she would feel nothing but happiness to know that-"

John threw the mug "what, that we slept together? That I miss it. That I miss her so much I can feel it? I won't do that to you. Or to her."

Sherlock turned his head "I want it though." He stepped forward and brushed his fingers through John's hair. "You won't be betraying her. You know that."

John lowered his head. At first it was just small tears. They turned into choking sobs.

Sherlock knelt down and held John. Half an hour later, John leaned back, pulled a tissue from his trouser pocket and wiped his face and nose clean. "Not very romantic."

Sherlock grinned "have I ever seemed one to want romance?"

John shook his head, let Sherlock pull him from the floor and followed Sherlock into his room.