Complex sentence: Shirley walked out on her children in 1989 when she and Kevin divorced and did not even attend the funeral of her son Jimbo, who died of cystic fibrosis at the age of 21 in 2002.
Split into simpler sentences: Shirley walked out on her children in 1989 when her marriage to Kevin ended in divorced. She did not even attend the funeral of her son Jimbo, who died of cystic fibrosis at the age of 21 in 2002.