Two Days in Aragon — M.J. Farrell

Grania and Sylvia live in the Georgian house of Aragon, with their mother, Aunt Pidgie and Nan, the family nurse. Grania is conducting an affair with Nan's son, Foley, whilst Sylvia falls for Captain Purvis. But the days of dignified calm are numbered, for Foley is a member of Sinn Fein.