Her Gilded Prison

She was determined to secure the succession, he was in it for the pleasure. Falling in love was not part of the arrangement.
When dashing twenty-five-year-old Stephen Cranbourne arrives at the estate he will one day inherit, it's expected he will make a match with his beautiful second cousin, Araminta.

But while proud, fiery Araminta and her shy, plain sister, Hetty, parade their very different charms before him, it's their mother, Sybil, a lonely and discarded wife, who evokes first his sympathy and then stokes his lustful fires.

As Stephen introduces Sybil to every pleasure she's been deprived of, duty and passion become a deep and mutual love. But with the unexpected arrival of a contender to the estate, Sybil realises that what she's set in motion to save the family might have tragic consequences.
Her Gilded Prison is Book 1 in the Daughters of Sin series, a Regency-set 'Dynasty' that follows the sibling rivalry between Viscount Partington's two nobly-born and his illegitimate daughters as they compete for love during a London Season. Her Gilded Prison can, however, be read as a stand-alone.
Book 1: Her Gilded Prison
Book 2: Dangerous Gentlemen
Book 3: The Mysterious Governess
Book 4: Beyond Rubies
Book 5: Lady Unveiled~The Cuckold Conspiracy