The Five Steps of Nesting

Takes place two weeks after the end of Six Steps of Courtship. Sherlock and John get some surprising/happy/deeply stressful news and decide that Sherlock will have to take a break from crime solving once his 'delicate condition renders him useless.' They decide to: sneak in a high profile case before then... which gets a bit more complicated than they planned, to just 'take a look' at this smuggling ring business (What could go wrong?), all while trying to get through the five steps of nesting, which play with Sherlock's instincts and turn him into a madman of snuggling and cleaning.

John is understandably tired.