Who is Lillian Moller Gilbreth from Cheaper by the Dozen and what is their importance?

Lillian Moller Gilbreth (Mom) is Frank's wife. The couple has a dozen children. Frank and Lillian both wanted a large family, and as a couple formed the perfect pair. Frank was boisterous and an advocate of corporal punishment. Lillian opposed him and dealt with her children by talking to them. Lillian is described as having had a great sense of humor, a lot of patience, and a caring and giving nature. Most important of all.... she adored her husband.