A/N: SammyKatz requested a prequel/sequel to "Thunderball" with some possessive Sherlock. It's taken me a while to get around to it, but I hope I've done it justice :) Hope y'all enjoy it :)

Disclaimer: I own nothing.

Dedication: For SammyKatz (happy belated birthday) x

Possessive Much?

Sherlock looked up suspiciously as John entered the morgue singing 'Happy Birthday' loudly and slightly off-key. His eyes narrowed as they took in the tray he was carrying that contained three cups of coffee and a cupcake with a lit candle.

Molly looked up from her paperwork with a small giggle, blushing furiously as John set the tray down on the table and handed her the cupcake with a courtly flourish.

"Happy birthday, Molly," he said cheerfully, "make a wish," he added, indicating for her to blow out the candle.

Molly smiled and, closing her eyes, did as she was bid; eliciting a small round of applause from John.

"This is a place of work," Sherlock stated flatly from where he was examining a body.

John glanced at him, "It's Molly's birthday," he said, as though that explained everything, "loosen up a little."

Sherlock's only response was to narrow his eyes further as he considered how close John was to his pathologist. "I hope you're not planning on eating that, Molly," Sherlock continued, ignoring John's comment, "it would be unsanitary."

"Are you kidding? This is probably the cleanest place in the city," John scoffed, "don't listen to him, Molly," he added, turning his attention back to her, "it's your birthday, do as you like."

Sherlock made a sound somewhere between a scoff and a huff as he turned back to the corpse, although he was still watching the pair out of the corner of his eye.

A fact that didn't go unnoticed by John who raised an eyebrow, a suspicion forming in his mind. "All right, I'll let you get back to work then," he said with a smirk. "Once again, happy birthday," he said kindly, leaning over to kiss Molly on the cheek.

A loud crash from Sherlock's direction made them both jump and they turned to see Sherlock grumbling to himself as he picked up the tools he'd knocked over.

"Everything all right?" John asked innocently, fighting back a smile. Sherlock shot him a dark look, but said nothing and John lost the battle against his smile.

He was going to have fun with this.