Its rough thinking about how Miquella ended up treating Melania the same way Marika treated Maliketh. I know that the DLC is basically Miquella running a "greatest hits" of all of Marika's worst mistakes, but jesus.
I wonder if he ever really did intend on going back for her? Either way, it probably went out the window after he dumped Trina. Switch flipping in his brain putting Melania from "My Sister" to "Tool I Have No More Use For."