I echo Corrinna. And, would approach it as Laura suggested. Maybe plan it to be a couple deal thing...like first, go borrow something...and make the chat light..kids, housework, the weather...then, return whatever you borrowed. This time, open up YOURSELF....."things are soo tough for me right now, I feel like I can't control anything, kids are acting up...". That gives her the chance to open up.

If she doesnt...then, I think you need to step it up several notches. People that beat their spouses often turn to the children. A battered woman has much more to it than just someone being beaten. There is a psychology to it that I don't profess to understand, but, it may well mean she will continue to deny things.

Be comforting, non-judgmental, and a friend to her. Good luck.