Dogged research reveals something you always suspected to be true. Unfortunately divulging this information may result in someone you care about getting hurt. This is one of those times when you have to ask if it's really worth it. Are you sharing this information because it's the right thing to do or are you sharing it because it proves you were right all along? Truth and love don't always mix and sometimes it's better to withhold than reveal. That said, knowing what you know doesn't have to make you complicit. You're still free to nudge, wink, and hint until this person discovers the answer for herself.