Bath Tangle, Paperback/Georgette Heyer

Noted for his eccentricity, the Earl of Spenborough leaves a widow younger than his own daughter Serena, and his fortune to the trusteeship of the Marquis of Rotherham - the man his daughter had jilted. Here, Lady Serena finds herself involved with her lovely young stepmother, Lord Rotherham and her own childhood sweetheart.