At the age of 11, Brooke's grandmother had a stroke in her garden. Not only was Brooke the one who found her, but she also called the ambulance.
Just days after visiting her grandmother in hospital, Brooke's mum took her own life. At the wake, Brooke was sexually abused while she was sleeping.
"I don't remember how I processed that information or how I was feeling in that time, but what I do remember is I found a phone book and a house phone and I looked up my dad's name and I found a number and dialled," she confessed in her TED Talk.
When her stepmother answered the phone, Brooke asked to be picked up which her dad did 24 hours later. Leaving in the middle of the night, Brooke left home and didn't even say goodbye to her brothers.
"I felt like I'd lost everything in that moment. I lost my sense of belonging, my family, my mum and also my connection to my Aboriginality. This was when I had first ever thought of suicide."
Though Brooke went on to live with her dad and his family and developed her love of sport, her relationship with the other side of her family wasn't a good one.
"I moved with my dad but he was working away and thought that living with his wife [Brooke's step mum] would be good for me because she would be a motherly figure. So I lived with my step mum, which was complicated," she told NW in 2018.
At 15-years-old, she was kicked out of home.
"I'd had to take care of myself and I remember the same feelings I had at 11 came rushing back when I was 15 - 'Why won't I be loved? Why will I never be good enough? and why do I honestly keep bouncing from home to home?'"
But when a teacher took her in and showed belief in her, she began to not only believe in herself and go to therapy but she went on to work in the youth sector.
"My biggest passion in life is mental health, from working and growing up with a lot of drug and alcohol violence in my childhood really," she told SBS' Noongar Dandjoo.
She also told NW: "I think everything is an experience you have to try and turn negative into a positive."
"Growing up I didn't really want the life that I had, so I made it my focus to do whatever I needed to do to have a better life and to help young people in my situation."
Though years have passed, Brooke still keeps the memory alive of her mum.
In a throwback Instagram post, the Bachelor star recalled the time her mum worked hard so that each child would have at least one present under the Christmas tree.
"One of my early memories was this Christmas, my mum was alive and she didn’t have a lot of money, she tried really hard to put at least 1 present under the tree for all of us kids this Christmas. Oh and how god damn good was that pair of snorkels I got. I was just grateful for what I did get rather than what I didn’t get. But what I don’t get is what I’m wearing in this photo," she wrote in the caption.
"I know she will never hear it but I feel like she is," she wrote on Instagram in May.
"Dear mum, it’s been 14 years without today which means it’s RJ’s birthday too. He’s 17 Which means one more year til 18 which is scaring me. I promised that I would make sure he remembers you for how beautiful you were and your soft, kind soul but your fierceness if need be. I like to think that I’ve had an influence on him in some way, coz he’s now asking me to do face masks he’s so beautiful mum and I know every year without you, we learn to celebrate and take it all in for what it is. I wish you were here everyday but I know you’re there watching down on us. I wish I got to appreciate you a little more but I know you’re missed and loved everyday. Love B, T, E, RJ and Ky. X"
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