Lark Voorhies ’ mother kept the actress (mostly) in the dark about an obsessed fan. Voorhies’ mother, Tricia, appeared in a new episode of the Hollywood Demons docuseries, "After the Bell," where Tricia revealed that a “psycho” fan terrorized Voorhies while Saved By the Bell was on the air. According to Page Six , Tricia also described the fan as "dark," "obsessed," and "demanding," telling viewers he sent Lark many letters laying out his plan to "be her husband" and warning that he intended to "kill anybody who would try to get in the way of that." The threat was serious enough that Tricia said she was afraid to let her daughter answer the door for a period of time, fearing the fan might show up in person. To protect her daughter, Tricia said she withheld most of the letters from Lark. "I didn't want her to have that kind of fear," the mother explained.…