Her Duke: Roxton Foundation Series, Book 3 (Unabridged‪)‬

Domestic harmony is once again disrupted at the villa, this time by one of the Duke’s ex-lovers—the Comtesse Duras-Valfons, claiming Roxton is the father of her infant son, which is supported by the Salvan ancient aunts. 

Intent on causing mischief for Her Duke, they also hope to embarrass the Duchess by dragging her into the scandal. Every French noble may be aware of the Comtesse’s shocking claim as to the paternity of her infant son. Everyone that is, except the Duchess. When she learns the truth, Antonia deals with the family drama in her own inimitable style.