Laurel Lance's sister

An unnamed woman is the daughter of a late unnamed man, the sister of Laurel Lance, and the mother of an unnamed child.

Biography
At some point in her life, the woman got pregnant. During her pregnancy, her sister, Laurel, often had to stop her from drinking alcohol.

Season 7

 * "Lost Canary" (mentioned)

Trivia

 * It's heavily implied in Lost Canary that the woman is an alcoholic.