DANBURY - As Lidia Quilligana begins serving a 15-year prison sentence for abusing three children in her care, the family she left behind remains in turmoil. Quilligana, 32, had been hired as nanny by the children’s single mother in 2014 to help care for her 1-year-old twin boys, and later for their 3-year-old sister after she was removed from day care.