Two staggering coincidences result in the marriage of the reckless young Earl of Finchley and Lady Margaret Ponsby, a shy duke's daughter who's worshipped him from afar. . .
Countess by Coincidence is Book 3 in the House of Haverstock series (three connected marriage-of-convenience love stories set in Regency England).
Lady by Chance (Book 1 in the series) introduced the Haverstock family and spent two years on bestselling lists for historical romances.
In Duchess by Mistake (Book 2) an innocent visit to the Duke of Aldridge's to request a donation for her war widows puts Lady Elizabeth Upton in the midst of a most shocking scandal. . .
Countess by Coincidence.
A very good read.