The star took to her social media account in an attempt to spread the word about cyber-bullying and how it impacted her young sister's life.
"This is my sister Angie, she's 13 years old. She's bright, funny, kind and caring,' wrote Nation alongside a black-and-white snap her loved one."
"She also has high functioning Aspergers, anxiety and depression. She has been severely bullied for almost 3 years and the internal torment that she goes through on a day to day basis is crippling. Often, her anxiety is paralysing," she continued.
"Angie had spent the school holidays with our grandparents on their farm. It's a loving, healing place and there, she felt safe. She came home two days ago and having barely been on social media for the last 5 weeks she thought she would connect with friends online," she said before revealing her sister had contemplated taking her own life.
"My heart was in pieces when I learnt what followed," she added.
Nation noted that a girl of the same age as Angie sent her a horrible message, which read: "You know what would be better for [boy's name] and I, if you went and killed yourself. RIP."
"2 hours later, Angie had locked herself in my mum's room, threatening self-harm and phoned Lifeline," Nation continued.
"She pleaded with lifeline to help make it stop, expressing that she simply didn't want to be here anymore and she wanted to be with her dad (he passed away 4 years ago). "I want to kill myself, I'm going to kill myself, please help'', she wrote.
Nation then informed fans that ambulance and authorities made their way to her mother's home and helped her sister before she could go ahead with the suicide.
"This isn't the first time my sister has found herself in this dark place. A place where her thoughts are troubling, tormenting and deafening. People need to know and understand that their words can be the catalyst for someone like my sister," she stated.
'It infuriates me and saddens me that with tragedies such as Dolly's and having friends who have lost loved ones to suicide that this is still going on! It has to stop, it must! Spread kindness and make a stand for zero bully tolerance."
Indeed. Sending love to Alex's sister and family during this difficult time.
If you or someone you know needs help, contact Lifeline Australia on 13 11 14 or visit the website at lifeline.org.au. If it’s an emergency, call 000.