I LOVE the work that Alvaro Morte and Pedro Alonso put into Sergio and Andres’ backstory.
For anyone who has not watched it, I’m referring to the backstory given in this interview (x).
It’s not just about them being brothers, but even the details, like them having different mothers and their father leaving Andres’ mother for Sergio’s.
What I really like about this is that through my own headcanons it makes Andres’ stance towards women and love a little more understandable (certainly not justifiable though).
I do believe that as a boy he knew he was dying from a young age. When his father left he was traumatized and needed to feel that him leaving was not his own fault. Instead of hating the father whose affection he craved, he focused his bitterness on his mother: he wanted to believe that it was HER fault that his father left so that he wouldn’t blame himself. This would also be in line with his statements’ about women changing and being unable to satisfy men after they have their children, which consume their entire life; I see it as a misogynistic coping mechanism he used to keep his father on the pedestal he had put him on.
His high regard of his father would also justify why he would approach the brother he was left behind for after his father died: he would actually want to be close to the last living remnant of his father.