I told my situationship not to tell people about us and I found out he told his work colleagues. Is it fair of me to break things off?

So me and my situationship both were cheating on our partners. We hooked up once. I ended things because I found out he told his work colleagues about us and I see them at work. I know it’s all wrong but for me that crossed a line. Do you think it’s rude to share that information with fellow work colleagues that I see at work as well?

I told my situationship not to tell people about us and I found out he told his work colleagues. Is it fair of me to break things off?
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