Looking for a reincarnation fic

I'm looking for an Arthur/Merlin reincarnation fic.  In it they've been brought back a couple of times an in the most recent one, they are brothers, with Morgana as their little sister.  I think Merlin decides to bottom for the first time in a while, because h was in a concentration camp during WW2 and was raped by the Nazis? Does anyone know what I'm talking about?