Fem!watson regency ficlet

[vnovice]

There was this short little fic I read once where the characters were in a regency era partu or something. Sherlock was distracted by Irene, until Mycroft told him that Lestrade might propose to fem!watson, and that she would probably accept because her running around with sherlock had ruined her reputation. Then Sherlock ran off looking for her.

Does anyone know this fic?