Lydia used Sketchy to fill the plesures in her life. She wanted Sketchy to be with her. Sketchy planned to break up with her because he loves his other girlfriend. Lydia told him if he broke up with her, she would tell his girlfriend everything he done to her.
She later went over to Sketchy's apartment to tell off the girlfriend.
Unknown to her, a friend of Sketchy was posing as Sketch's girlfriend.
Lydia told her off and later got her ass kicked by the "girlfriend".
She gave up on Sketchy and left him alone.