I'm lost

At the end of chapter 17 when the younger "brother" brought up the beating that traumatized him, why did Alexi or whatever his name is not just explain the situation? Better yet why did he not explain why he did that like right after it happened??? I don't see any outcome where this has a happy ending, but i think an actual conversation would definitely help more than locking him up, raping and manipulating him. Like pls someone help me make sense of this. I can't even enjoy the power bottom smut, I'm too wrapped up in what's actually going on here