Sheila was Sweet Johnny's girlfriend who had a sexual affair with Earl Hickey.
Before Season 4[]
Sheila was Sweet Johnny's girlfriend and supported his crazy stunts, despite his many injuries. However, she was charmed by Earl and they began an affair, which carried on for a long time when Earl kept convincing Johnny to do crazy stunts. However, Earl began to feel bad and ended the affair and left Sheila with Johnny. She understood because Johnny was still a good guy, who put himself in dangerous situations.
A short time later, Johnny suffered a head injury, causing him to think the same day was repeating over and over. Sheila stayed with him for several years after the accident. However, Johnny had his accident the same summer "Living la vida loca" became popular, and therefore got the song stuck in his head. Sheila couldn't stand him singing the song over and over, so she left him. Johnny still believes that he is with Sheila.
Season 4[]
After discovering karma, Earl sought out Johnny but found him forgetful so went to Sheila. He saw she was working as a meter maid and asked her what was wrong with Johnny, and she explained the accident. Earl noticed
Earl squeezes Sheila's fat ass
that her hips had widened and her butt had increased significantly in size, so much so that her fat ass got stuck as she struggled greatly to move between two cars parked closely together. She encouraged him to squeeze them "for old times sake". Earl could not take his eyes of her large behind but complied. Earl told Johnny about the affair, and he became angered. He also told Johnny about his memory loss, forcing him to try to commit suicide in a crazy final stunt.
Earl managed to stop him, with the help of Joy, and Johnny went back to his routine of repeating the same day over and over again ("Sweet Johnny").