I was just thinking of Damian Wayne and this idea just popped in my head.
The Damian we have in the comics is a clone.
Not to crazy a theory because there are a bunch of clones of Damian but I don’t mean it in that way.
In an older comic before Damian was introduced to the public a baby named Damian was adopted by a family and we never found out what happened to him and assumed that he probably was retconed (and maybe he was).
It was said that Damian was artificially aged up but wouldn’t Bruce know if he had been with Talia in that way 7 years ago and somehow has a 10 year old kid and someone could say that he may know about the artificial aging up because of Heretic but I think he would make some what of a big deal out of it (he’s Bruce!!!).
So thinking that Bruce thought that Talia lied to him for ten years about Damian and doesn’t know that Damian was artificially aged up then he wouldn’t have much to question if Damian was a clone and the only comparison he would have to tell if Damian was a clone would be Heretic and Bruce wouldn’t touching him with a twelve foot pole. 
So my theory is that Talia after fully realizing that she was going to be having a baby with her beloved may have also realized that she doesn’t want to put her child through what she had to go through or have her child be apart of Batman’s endless crusade against crime. So she lies to Bruce and has original Baby Dami and puts him up for adoption to a very kind family that she trust to take care of her baby and will allow him to have a normal life and begins making clones with original baby Dami’s dna and then when she get out Damian she artificially ages him up and begins his training and I feel like she still cares about the clones because they are her sons but she feels less guilty about training one because she made him for that exact purpose and along the way did grow to care for the clone of her son/the Damian we all know but still keeps her distance emotionally.
So I just think that somewhere out in the world there is a Damian that is just an average kid and living the life of an everyday person with his two adopted parents living happily ever after. And that thought makes me happy