I was just rereading Son of the Demon. The graphic novel where Batman gets Talia pregnant. As far as I know this child was/is supposed to be Damian. Now
So here's what I'm thinking. While Talia is a rather cold individual and does a lot of messed up stuff often. At heart I feel she is a nurturer. She puts the idea of family above all else. She cares deeply for her father, took care of Jason, and was extremely passionate about avenging her mother. So I have a hard time buying that she would stand by and let her actual son get beat to near death multiple times. This is why I'm starting to think that the Damian who is Robin right now is really a clone of the original Talia gave away. I think Talia gave up her real son and began cloning him to stay in her father's good graces and to feel good about knowing her real son is in good hands.