My lover was also invited to the wedding I was invited to. I don't want my lover to meet my fiancee, what should I do?

I will go to the wedding with my fiancée, but if my lover suddenly shows up, my life will be ruined. Because I don't want to lose my fiancée, I love him.

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The problem is, my lover doesn't know that I have a fiancée either.
My lover was also invited to the wedding I was invited to. I don't want my lover to meet my fiancee, what should I do?
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