E.E.
Speaking as the one goig through the divorce - don't sensor.
If she's a good friend, she wants to hear about your problems as much as she wants to tell you hers. Sometimes she just wants things to be "normal" and that includes hearing about the annoying things your husband does.
Even hearing you ask this question could make her feel horribly guilty (I'm thinking of my own BFF now and wondering if she feels the same way).
Be there as a sounding board for her. Tell her you're there if she needs to talk, but don't be surprised if she doesn't want to.