"John!" Liz exclaimed.
"Sherlock." said John.
"Yes John?" Sherlock asked.
"What the bloody hell are you doing in bed with my fiancee?"
"I can explain Jo-" Liz started.
"Sherlock," John said, "I don't know if you heard my question. What are you doing in bed with Liz?"
"Ah, that's a simple question." Sherlock replied. "My symptoms earlier, led me to believe that I am 'in love', so to speak with this fiancee of yours. Having nearly no experience in such emotion led me to consult the internet, as well as, ahem, Mycroft. He assured me that the symptoms I was experiencing were indeed love. As such, I proceeded to carry out an experiment, with satisfactory results."
John just stared at Sherlock. He turned around, and breathed slowly, while counting to ten in Pashto. He stopped, and then turned to Liz.
"Liz? What happened?" he asked.
"Erm, John, let's talk outside." she said.
"No need." said Sherlock. "I'll go get the tea." he said, in an unusual display of sensitivity.
Sherlock left the room, leaving the couple to look awkwardly at each other.
"Um, I'll put some clothes on." Liz said, and John looked to the side while she pulled on her knickers and her clothes.
"So."
"John, last night I discovered something. I... got drunk. Really, really drunk, and I went home with Sherlock, because he was so handsome and he flirted with me." Liz's eyes started to fill with tears. "But-t, I think John, that we don't go together. Sherlock made me realize - you don't give me any attention, and you're just not invested in this relationship. I- I think it's best if we end this."
John gaped at her.
A year of dating, 3 years as friends, a beautiful ring. After one night with Sherlock she-
Fine.
"John I-"
Oh, he had said that out loud.
John sighed. "Liz, it's alright. We can break this off."
"Um, John, there's one more thing..." she continued, while nervously twisting her fingers together.
"I've gotten married to Sherlock."