Lucille was 50 years old when she and Gary got together. He was certainly younger, but they never had any children together. However, Lucille had two children with Desi: Lucie Arnaz and Desi Arnaz Jr.
They both followed in their parents' footsteps of working in the entertainment business in film producing and performing. And with grandchildren who did the same, it's safe to say that Lucille's legacy has been kept alive and well.