Hello honeysuckleVine: Since you're new here on PC... welcome to PsychCentral! I hope you find PC to be of benefit.

With regard to your concern, it seems to me it should really not be your responsibility to share what you have learned with your brothers. Your father revealed it to you & he, as your brothers' father, should now reveal it to them. On the other hand, this situation does put you in a precarious situation. Because if your father chooses not to share the information with your brothers, then you are in possession of information they do not have. And if your father does not reveal the information, & at some later date, your brothers learn you knew but did not tell them, that could potentially anger them.

From my perspective, you're kind-of between the proverbial rock & a hard place on this. So I think what would be appropriate here would be for you to ask your father (firmly) to share with your brothers what he has revealed to you. Explain the difficult position you are in so that he (hopefully) understands where you're coming from. Agree to a time frame within which he will speak to your brothers (so this whole thing doesn't just drag on forever.) But also tell him that if he does not share the information within the agreed upon timeframe you will do so yourself. (An alternative might be for you & your father to arrange to share this difficult information together with your brothers.)

Will your brothers think you're causing trouble? There's really no way to know. But I would think that if you explain to them how you came by the information, & the difficult position it put you in, perhaps that will help to ensure they will not think you're just out to make trouble. Ultimately, though, you can't control how they will react. And that is part of the difficult "inheritance" your father has bestowed upon you. You can only do your best to make sure everyone understands what is occurring & how it came about. My best wishes to you...