Sherlock felt his stomach fall as soon as he knocked it off the counter: he had just broken John's favorite mug. He quickly formulated a plan to clean it up and replace it. He could hopefully get it done before John noticed.
John walked through the door as Sherlock was picking up the big schards. "I'll replace it," was all he said. Apologizing was easier for him now due to recent changes in his life but it still sounded like a brush off.
What Sherlock didn't count on was how difficult it would be to find a duplicate. He searched for a replacement for some time before he found one. Estimated delivery time was two weeks from the order date. He entered his payment details and kicked the complete payment button. Sherlock briefly considered calling his brother but quickly dismissed the thought. Sherlock didn't hesitate to call Mycroft for big things (information for a case, getting him out of trouble, their parents inviting him and Molly to a West End musical, that sort of thing) but in the grand scheme of things this was minor.
The mug arrived one Tuesday morning's post when John was at work and Rosie was at her daycare. Perfect timing, really, for Tuesdays were Molly Days. Things had changed a lot since Sherrinford. John and Rosie moved back to Baker Street and he and Molly started dating. As long as she wasn't working Tuesday evenings and he didn't have an active case they went out for dinner. This week, Molly was on call and he didn't have an active case so they were going out.
Sherlock carefully washed and dried the mug and placed it in the cupboard. Without further thought he worked on his experiment until it was time to meet Molly, leaving some of the equipment on the table.
Dinner was good. Angelo's was always good but his company always made it better. He got home to Baker Street around ten o'clock to find the flat quiet and in order. John's mug was on the counter, a small note with it. "Thank you" was all it said.