I (28M) always got along well with my brother’s (30F) fiancée, but last night, after a family dinner, she pulled me aside and told me she’s had feelings for me for a while — and isn’t sure she can go through with the wedding.

I was stunned. I’ve never given her any sign or encouragement. I’m incredibly close with my brother and genuinely happy for him, or at least I was. Now I feel like I’m holding a grenade with the pin half-pulled.

She made me promise not to tell him, saying she just “needed to be honest” with someone. But I feel like I’m betraying him by staying quiet. At the same time, if I tell him, it could ruin his life — and he might not even believe me.

I don’t want to be part of this drama, but I feel trapped in it now. What would you do?