Me and my brother are both males my brother was 3 years older then me. Actually he is my half brother my father was his step father he never knew his real father but anyways. I have alot of fuzziness due to that era but he has sexually abused me multiple times.
I never knew how to deal with I think it literally screwed up my whole life. Now it gets worse my father passed away like 5 years ago
A few years later after my father's death my brothers kids opened up
And claimed my father abused them my brother has 4 kids 3 boys 1 girl. 2 of the boys made the claim I was shocked. Then my brother claimed to me privately that my father sexually abused him and I started to question it and he shut off and said I dont qant to talk about it. This is a extremely huge mess. Now I'm the only one who has not said anything and its killing me as if and when I do say something it definitely will tear my brothers whole family apart and what he built. Plus my brother can be very violent I feel if I try to talk to him or open up he will try to shut me up. I really dont even know how to process all this. Please advise

Ps I have not even told my wife who also was sexually abused from her previous marriage.