She became heavily invested in the Delahaye concern, first campaigning sports cars for them and then championing the development of a Delahaye Grand Prix car, which she ran under the Ecurie Bleue banner.
Ela fixo un investimento moi elevado na empresa Delahaye, primeiro facendo campaña dos coches deportivos e despois defendendo o desenvolvemento dun coche Delahaye de Gran Premio, que participou debaixo da bandeira de Ecurie Bleue.