Summary- after Edward and the Cullen's left (The Cullen's are humans) Bella left home and changed her name to Nancy. Jill was a family friend and her parents took Bella in after she explained everything. Bella went to Berkley and met Judah. They fell in love, got married and had Silas and Shane. A few years later Judah died of a sudden heart attack while running with Shane.
To support her upper middle class lifestyle, Nancy began dealing marijuana to her affluent neighbors and friends. Her supplier is Heylia James, a major distributor in Los Angeles' West Adams district whom she met through Heylia's nephew, Conrad. After losing customers to a medical marijuana store, Nancy begins baking and selling pot-laced brownies. Acting on the advise of her accountant, city councilman Doug Wilson, she opens a retail bakery, stocked with Costco baked goods, as a front for her drug sales. Silas begins dating Megan, an attractive deaf girl at his school. Shane, troubled by his father's death, acts out, such as biting the foot of another child in a martial-arts tournament, and earns the nickname "Strange Botwin" from classmates.
Nancy's friend is a manic, image-obsessed, manipulative, and controlling Celia Hodes, who is the president of the Agrestic PTA. Celia does not get along with her cheating husband Dean; nor does she get along with her sexually active 15-year-old daughter, Quinn (Silas' previous girlfriend), whom she sends off to boarding schooll in Mexico after the pilot. Her younger daughter, 11-year-old Isabelle, is overweight and constantly the target of her mother's passive aggressive comments. She reveals late in the season that she is a lesbian, much to her mother's chagrin. Toward the end of the season, Celia is diagnosed with bilateral breast cancer. The brush with her own mortality softens her abrasive personality and leads her to treat her own daughter with more courtesy and respect. She quickly returns to form after her recovery however. Before her surgery, she picks up Conrad and has sex with him. Conrad is long-time friends with Andy Botwin, the younger brother of Nancy's late husband and the black sheep of the family. Andy says he has moved into the Botwin household to help Nancy out, but actually seems to be there to free-load, and to disrupt Nancy's life. When he is notified to report immediately for his previously-agreed-upon military service (where he will be trained and then sent to Iraq), or be sentenced to a military prison, he announces that he is studying to become a rabbi as a dodge to avoid his military obligation.
(Everything that happened in 2-4 already explained were gonna start of in season 5!)