 They had seven children together, and Yvonne also gained a stepson from her husband's first marriage (his first wife having died in 1914).In her memoirs, Yvonne remembers that in the early years of Dewis's career, her mother regarded her father's painting with benign indifference.She writes that Elisabeth DeWachter was pleased with her husband's choice of "hobbies" in one sense, telling her friends, "at least it's not noisy."