Social quandary: A friend's cheating husband

Have you found yourself in an awkward situation? Has someone irked you and you're not sure how best to proceed? If so, you're not alone! Every week, we'll be featuring a reader-submitted quandary so that you can help weigh in and give your input. What would you do in their situation? Please comment below and help this reader with your feedback! If you'd like to submit your own quandary, click here.

Quandary this week:

A friend of mine recently told me that her husband cheated on her. While I’m not close with him, my friendship with her has blossomed through mutual friends. The night she told our group of friends about the cheating, we were all supportive and told her we’d support her in whatever she decided. But, to be honest, I think we all assumed she would leave him. Months later they are still together and every time we get together (just the girls) we don’t talk about it. Am I being a good friend for supporting her decision? Or would a better friend give her my two cents and tell her she should leave? Is being a friend being blindly loyal or do I have to say something? Or is it completely none of my business what she does or doesn’t do?