No I was saying it's possible they don't know the true relation they have to Elis and think of him as their brother, so it's still his view point in that vision
I think thats because in Seraphine's family* twins carries the curse of reflection. Just like her and her sister, Elin and Elis or the twins we saw in the last blood vision.
The conversation you have with Una before the vision of the horse and the tree indicates that reflection metaphysics apply to all twins, not just the one in our family. Although we do seem unusually prone to them.