A Price for Everything by Mary Sheepshanks
Sonia, Lady Duntan, loves the family seat rather more than she does her husband. The demands of marriage and four small children have conspired to over shadow her sense of self-esteem and the huge, crumbling white elephant of a house represents the rebellious freedom she craves. Archie, however is adamant: their lifestyle must be preserved and the house must go. When Archie - who has got both more and less from his marriage than he bargained for - embarks on an affair with the pneumatic Rosie Bartlett, Sonia is even more determined to thwait his plans. But as her conspiracy widens to include her glamorous but unreliable mother-in-law, a rather sinister Buddhist monk and the urban Mr Hadleigh-Turner from the company Heritage at Risk, things begin to spiral out of control.