Celine Fournet (1847-1900) married Isidore Guerin, Therese's uncle, in 1866. She was very close to Therese's mother, Zelie, and it was to give his motherless children the advantage of associating with the Guerin family that Louis Martin left Alencon for Lisieux in 1877. Her niece Celine described her as "an angel of peace and sweetness."