"She's being strong," Nicky told reporters after the 30-minute visit at the Twin Towers Correctional Facility's medical ward.
Nicky's boyfriend David Katzenberg drove the pair to the downtown Los Angeles jail unit that treats inmates for physical and mental ailments. They entered through a crush of photographers, filled out visitation forms, and were whisked upstairs.
Other visitors grumbled that they jumped the line.
"We don't care about no Paris Hilton," said one upset mother. "We're here for our families."
Said another relative, "Why did they get to go up first, that's what I want to know?"
Sheriff's spokesman Steve Whitmore denied the pair got special treatment.
Hilton, 26, originally surrendered June 3 to a women's jail in Lynwood, Calif. She says she will not fight her sentence and serve out the remainder of her minimum 23-day term for violating probation in alcohol-related driving case for driving with a suspended license. With time off for good behavior, she could leave in just over two weeks.