Shortly after his marriage, Carrouges revealed another motive for the union. The valuable estate of Aunou-le-Faucon, given to his rival Jacques Le Gris two years earlier, had been formerly owned by Carrouges' father-in-law and had been bought by Count Pierre for 8,000 French livres in 1377. Carrouges immediately began a lawsuit to recover the land based on an assumed prior claim to it. The case dragged on for some months until ultimately Count Pierre was forced to visit his cousin King Charles VI to officially confirm his ownership of the land and his right to give it to whomever of his followers he chose. Despite losing the case, the lawsuit reflected very poorly on Carrouges at the court in Argentan and resulted in his further estrangement from Count Pierre's circle.