Gretchen Scolnik was the mother of Chuck, she's an alcoholic and was married to Wade Scolnik.
She was known by almost every resident of Tree Hill as an alcoholic. It is implied that she may be the reason behind Chuck acting out towards his peers. After Chuck's father Wade returned she often denied Wade's abuse. She also cornered Chuck into lying to a police officer about his abuse just to free his father. The next day after Chase visits her, Gretchen breaks down into tears saying she doesn't know how to stop him. Chase tells her to keep him away or it might be Chuck in the hospital.