For some unknown reason, Frank Longbottom has sent James to use his "legendary charm" to recruit support for the Order of the Phoenix at a high society party at the Malfoy estate. James could get in - old pureblood family and all that.. Severus, of course, would not officially be invited. Lucius is just taking a little Severus break out in the courtyard. The clues are there, but Probly too sketchy.
no subject