Work Text:
Rosie clung to the front of Sherlock's Pea coat as he carried her into Baker Street and up the stairs. Once inside the flat, Sherlock put Rosie on her unsteady feet and watched as the girl, dressed in footie pajamas, toddle toward her daddy.
"I'll put the fish and chips on the dining room table," Sherlock said, leaving John with Rosie.
"Da," Rosie said, looking-up at Sherlock in a tone that could only come from a 2-year-old, "Daddy home. See Daddy."
"I see, Rosie," Sherlock said, wondering when he'd become Da to John's and Mary' s toddler .
John put his mobile down, got out of his usual chair and scooped-up Rosie into his arms.
Rosie clung to the front of her daddy's Fair Isle sweater as he carried her toward her da. "Da play sleep, Daddy?" Rosie asked.
"If you say please and clean your plate," John said, "I think your da will play you to sleep."
"Peas, Da," Rosie said.
"Eat your fish and chips," Sherlock said, "and I'll play you to sleep."
Rosie patted her da on the cheek and said, "Dank you, Da."
"Thank you, Sherlock," John said, leaning forward to press his lips chastely to Sherlock's.