I Caught My Sister’s Fiancé in a Compromising Position Two Months Before Their Wedding. I’m Considering Keeping That to Myself.

Dear Prudence July 27, 20266:00 AM Photo illustration by Slate. Photos by Getty Images Plus. Our advice columnists have heard it all over the years—so we’re diving into the Dear Prudence archives to share classic letters with our readers. Submit your own questions to Prudie here. Dear Prudence, This question seems like it has a simple answer, but bear with me—I think it’s more complicated than it seems. I caught my sister’s fiancé cheating on her, two months before their wedding. Do I tell her or not? Thing is, I love my sister to bits but she makes bad romantic decisions at an Olympic level. Her fiancé has cheated on her before, left her, stolen money, come back, wrecked her credit, wrecked her car—every time she says she’s through with him, and every time she takes him right back. So I a