Gimme a Break! (1981) : 3x14

When the Chief tells Samantha that she cannot go out on a date with a boy, Nell decides to tell the girls the story of how she met their mother and how she became a second mother to them. Nell goes to perform in California in 1974, and Margaret remembered Nell from when she saw her sing before and caught her performance. Nell then quits her job when her boss gets kinky with her, and Margaret takes her home to stay with her. She meets the family and she sleeps in Carl's room. When Carl comes home he is shocked to find another woman in his bed, and then grows sick of Nell, since she doesn't have a job. After a few days, a job offer in Bakersfield is thrown upon Nell, and when she gets the aceptance, Margaret tells her she is dying and wants her to raise the girls. She madly regrets it, but deep inside Margaret knows she loves the girls. Nell then refuses the job in Bakersfield and decides she will promise to be there for the girls from then on.