[Miles hates to be the bearer of traumatizing news-- he feels like he always is, with all the notices of death letters he'd personally written over the course of his life-- and he keeps quiet as Reiner processes it, saying nothing. Miles has his own, long standing fears associated with cloning, but they're complex and well articulated already, and it does him no good to go over them again to himself.

With that on his mind, he volunteers,] There's two of me. I have a clone normally, that is. Back home. My brother Mark. Pity he's not here-- I could ask him how to deal with being a copy of me.

[There's a slight, darkly sarcastic edge to that statement, years of weighted history behind it, but Miles means it as a light diversion.]