Paris Hilton's younger sister Nicky Hilton left behind a mysterious red packet with the authorities in Lynwood prison, after she visited her sister at the facility. The 23-yearold fashion designer was accompanied by her beau David Katzenberg and another blonde friend, reports a website. This is Nicky's second visit to her sister ever since the socialite has been in the slammer. Last week, after her visit to the Twin Towers Correctional Facility's medical ward, rumours were rife that Hilton was receiving 'preferential treatment' at the facility. Apparently, sister Nicky was said to have jumped queues to fill visitation forms. This was not liked by many other visitors. "We don't care about no Paris Hilton. We're here for our families," a magazine quoted a visitor, as saying. "Why did they get to go up first, that's what I want to know," another visitor added.