I've name-changed for this one.
I've recently discovered that my aunt knew my dad was beating me and my siblings when I was a kid. She tried to talk to my (enabler) mum, who wouldn't discuss it. She did nothing else. Didn't report it, didn't make extra effort to keep in touch, nothing.
I am finding this hard to handle and feel very upset with her. We keep in touch and I don't know whether to bring it up and, if so, what to say. She's my uncle's wife ie she married into the family and I think she may have been afraid to rock the boat but it's very hard knowing she did so little to help. What on earth should I say to her? I can't just pretend it's fine.