Jalna Series by Mazo de la Roche

When Renny Whiteoak came home from the war he discovered many strange things at Jalna. Not least among them was his young brother Eden's romantic affair with an attractive widow. Renny determined to put a stop to it. But when he met the infamous Mrs. Stroud, Renny found himself reluctantly entangled in her dangerous web.

The Jalna saga unfolds the lives and loves of the unforgettable family whose heart is centered in Jalna, the great, rambling mansion from which the series takes its name.This is the story of two marriages--that of young Piers who has created a tumult by marrying without the family's consent . . . and of Eden, the poet, whose marriage to an outsider triggers a different, but equally powerful conflict ...