 Parents may think their children don't know what's going on |
Domestic violence has horrifying effects - not just on the direct victims but on the children who witness such attacks but can do nothing to stop them.
Official estimates suggest that three quarters of a million children witness violence in their own home each year.
Now, a new website is being launched to help them make sense of what they're seeing - and to get help and support.
The Hideout has been developed by the charity Women's Aid.
It's aimed at children and teenagers - and it even features a special "panic button" so that if a user is disturbed, it can switch to another site, such as CBeebies or MTV.
We heard the story of one teenager, Daisy, who witnessed terrible arguments between her father and her mother. And, we talked to the Chief Executive of Women's Aid, Nicola Harwin.
"The domestic violence began when I was 10," Daisy told us. "I would hear lots of screaming and shouting - and my elder sisters trying to stop it.
"Every night I was waking up to the sound on shouting - I'm not sure my parents knew I was aware of what was going on."
Nicola was one of six children - but she couldn't bring herself to confide in her sisters, or in any one else.
"I would go to school and not want to come home," she told us. "Then I'd feel guilty because I knew if I was at home, nothing would happen."