What is the most disturbing thing someone has ever admitted to you?

It's not disturbing now, but it was back then. My parents gave me to a 24/7 hour treatment home, far away from where they lived, yet my father promised me that he would come visit me if I needed it. When I asked him to come, he found out that he wasn't allowed to. Secondly I found out that my parents no longer had any power over when I could come back home, it was up to the psychologist and staff. I cried myself to sleep for the next 3 years, until an older kid taught me what to reply to the psychologist and it eventually worked, and I was allowed back home. 😅