So sorry to hear what happened to both you and your brother. But, welcome to MaleSurvivor. This is an amazing resource in terms of hearing other people's stories and struggles, and eventually posting your own if you decide to. It was my first step and was a tremendous help.
I recently disclosed to my mother, which was a pretty overwhelming experience, but very positive. I have yet to tell my brother, who I am very close to, and my father. They will both be really pissed (at the perpetrator), so I am not sure if I am ready for that, yet. I think I am still too angry myself, and don't want to add their anger to my plate, so to speak. And, I don't have the pressure to tell that you describe.
Anyway, I wish you good luck on your recovery and your journey.
"Great spirits have often encountered violent opposition from weak minds."