The How to Get Away With Murder star explained how her sister Danielle was only eight years old when she was sexually assaulted in the aisles of a corner shop, with the shop owner simply saying the perpetrator "does that to all the little girls".
Viola said she wants to "redefine" the meaning of the word survivor, as her sibling Danielle turned to drugs to help her get through her ordeal. She also detailed how a friend of hers lost her daughter to a murderous attacker.
She said: "My sister is now a heroin addict, she's a prostitute. The friend of mine who's a survivor, I call her a survivor because her seven-year-old daughter was taken from the backyard of her grandma's house while playing in the middle of the day. They couldn't find her for an entire day, and they finally found her sexually assaulted, strangled, dead. So her mom, she's surviving. It's just that when she's surviving, when she's alive just having a meal, she has flashbacks - post-traumatic stress disorder."
And for the Suicide Squad actress, the biggest concern is the number of young people still falling victim to paedophiles and sexual predators.
Viola revealed that half of the victims helped by the Rape Foundation are children, and urged the group to keep donating to places like the Rape Treatment Centre and Stuart House, who aim to help child victims.
She said: "They (children) don't want to just survive, they want to be warriors. They want to know that at the time that they were held down, and strangled, that wasn't their death. And you giving to the Rape Treatment Centre, the Stuart House, anything to make sure there's models just like that in this world, in this country is you living out loud."
- Bang! ShowBiz