Breaking the Triangle: Should You Tell a Cheater’s Spouse?

When you find out the person you’ve been seeing is married, should you tell their spouse?

Wendy Miller
7 min readNov 16, 2019

I’ve never dated someone who is married or in a committed relationship — to my knowledge. But I have been the betrayed spouse. My former husband cheated on me even before our wedding and continually throughout our marriage. And a recent two-year relationship ended after I learned that the man I was with was also seeing at least 10 other women — no wonder he didn’t have time for me!

When you do find out that someone you’re involved with is married or otherwise committed, the immediate urge is to tell their partner. Some of it may be outrage or jealousy; some of it may be a desire to do the right thing. Morally, telling the betrayed partner is the right thing to do. It’s the principle of it, if nothing else.

But relationships are complicated. Assumptions are made, beliefs can be tested, and doing the right thing can put you in situations you never expected.

So what should you do when you’ve learned that the person you’ve been seeing is married or otherwise committed? Is telling their spouse as black and white as it seems? Or should you stay out of it?

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