Season of Denial by Tracy Cooper-Posey

He’s a rake, she’s a not quite a spinster. Life is interesting when they’re together, but…

When her twin sister, Bridget, betrays Lady Mairin’s trust by marrying a man within the Great Family, Mairin determines she will find a suitable husband elsewhere, no matter what.
Iefan Davies, the family rakehell, who has rejected both the family and society, introduces Mairin to the Duke of Gascony, then teaches her to woo the duke. Between seduction lessons, Iefan shows her the world beyond the ton.
Neither considers the other suitable marriage material, for Mairin has a duke in her sights, while Iefan has no intention of curtailing his bachelor ways, although life is certainly interesting when they’re together.
Season of Denial is the seventh book in the Scandalous Scions series, which brings together the members of three great families, to love and play under the gaze of the Victorian era’s moralistic, straight-laced society.