Kelly Donovan is a suporting character in The Vampire Diaries. He is mother of Matt and Vicki Donovan and serves as secundary antagonist and henchmen in the final season along with your daughter.
History
Season 1
In the fist season, Kelly return to Mistic Falls and lived at your son's house. At this tima, she was an irresponsable mother that got drunk and got involved with younger guys, which shame her son. Some day, Matt caught her kissing Tyler, which generated a fight bethween the two, and Kelly get injuried. When she get home, Matt was arranging her things in bags, and a after a discussion, he send her away from city and his life. Relutanctily, she goes. Later, it is revealed that she is living in South Carolina.
Season finale
Kelly returns to Mistic Falls in season finale. This time, she works to Katherine and baceme a villainess. She starts killing aleatory peoples.