She moved to Sarthe to find work, where she met Alexandre Oyon, an insurer from Le Mans.
[1] Alexandre became deputy mayor of the city in 1935, while Oyon set up a secular home school in the working class Abattoirs-Batignoles district.
Initially imprisoned in Archives and the Fort de Romainville, Marie was later sent to Ravensbrück concentration camp in Germany, while Alexandre was sent to Amsterdam, where he died.
[1] After the war, Oyon returned to France and was elected to the General Council of Le Mans.
She was subsequently a French Section of the Workers' International (SFIO) candidate in Sarthe department in the October 1945 National Assembly elections and was elected to parliament, becoming one of the first group of women in the National Assembly.