Hi, I'm trying to find a fic and all I can remember is Sally saying "What did he follow you home" and John replying, "Yes, how do I get him to stop?"

Or something along those lines.

I think it might have been on A03.

Please help if you know what fic I'm talking about. I'm sorry I can't remember much else, but I do know it was a Sherlock/John fic.