With Norman's emotional and psychological state being questioned, how was he going to react when he finds out that his brother wants to have sex with Emma? Is it also going to cause heartbreak for Dylan if Emma doesn't get the transplant, or if she reacts badly to it? It could be a very short lived romance indeed. While it doesn't seem that Norman isn't interested in Emma romantically, he is rather possessive of his taxidermy animals, so what's he going to be like when he has to give up his friend to his brother?
