At the party, the flirty man sneaks up on the witty hostess and starts a banter with her naming two words with "QC" initials, that could be what they are drinking. She suggest "Quality Control", he retorts with "Quite Coiffable". She then says: "Rather Good". The banter screeches to a halt, "Rather good?" Yes, it's latin she says. And here I thought that Sed Bonum meant rather good in latin. Either way, she won. And the sherry is tasty.