YOU ARE THE ADVICE COLUMNIST: My Friend Is Cheating On Her Husband, Who Is Also My Good Friend

I'm thinking about telling him, even knowing it will probably end at least the one friendship.

Jan 16, 2014 at 6:30pm | Leave a comment

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I'm caught between two friends. They're married couple who are in the process of separating. I'm equally close to both of them. The wife is having an affair, and leaving her husband for her boyfriend. The husband doesn't know the extent of the affair. He is under the impression it's a trial separation and has his hopes up on reconciling, but she's actually moving forward to divorce and already moved in with her boyfriend.
She asked me to keep the new relationship and reason for the split a secret from her husband. I suspect it's because he's the bigger breadwinner in the relationship. Proof of adultery could jeopardize her shot at alimony and how their property is split up, and maybe even custody of their pet. 
Regardless of the reason, she's deceiving to someone who is also my friend, and deep down I side more with him. Given that she'll be ok financially with her own job, and has no physical safety reasons to lie about what's really happening, I think he should know the truth. So I'm thinking about telling him, even knowing it will probably end at least the one friendship, but not sure if it's any of my business to do so. 
Thanks for any of your thoughts. 

How would you navigate between these two friends? Would you tell? Let her know in the comments below!Please send all of your questions to Advice@xoJane.com, we are (almost) experts!