Nick Hogan’s time in jail and especially his time in solitary confinement has “broken his spirit,” his sister Brooke Hogan tells People.com.

“When they put him in solitary, he was on the outs,” she says of his 28-day experience, in which he reportedly rapidly lost weight. “I was worried about him, and his safety, and his well-being.”

“His personality is slowly coming back,” Brooke says, adding that her family gets to visit Nick three times a week now, but “it sucks” because, “I can’t just walk over to his room and give him a hug, or talk to him, or confide in him.”

The just-turned-18 son of Hulk Hogan is serving an eight-month sentence in jail for reckless driving that led to a car accident in Clearwater, FL last August. Nick’s good friend John Graziano was seriously incapacitated by the crash.