Jason's time in the league except he knew Damian.
Like yeah I know Damian is a test tube baby and got aged a bit faster or something but imagine this.
Talia, no matter how mischaracterised, develops a soft spot for Jason while he is catatonic. She is also a mother and has been/is undeniably in love with Bruce. No matter how much it sounds like she only loved Bruce to produce the perfect heir, they were in love, even if it was just once. She, mother of Bruce's child, raising him to be strong, the way she know how, ready to let him be free and meet his father, shall he desire. That same mother finds Jason, the dead son, of his grave, wandering, his mind never fully there, and decides to heal his injuries and help him heal.
Maybe that wasn't the plan, at first, maybe she never expect to be mother of a child not biologically related to her. Maybe by the way she was raised or by the standards that surrounded her. But now? As she watches her child, because Jason is her son, murder is professors because he finds them unworthy of breathing. Maybe then she realises that motherhood was something she wished for, maybe living peacefully. She wouldn't, though. Maybe in another time, but now? She had her father to manipulate while watching her children thrive.
Maybe they could've been in a life without blood, but the doubts it. The kids are attracted to danger, most likely, they love saving. Albeit their methods bloody, she knows it won't last long, with her beloved so close.
Maybe she lets Jason go back to Gotham, followed by a couple Shadows under her and her sons command only. She calls every week, checks in, asks what his plans are, how the bat is doing. Maybe she lets him yell at her, his frustrations wild, that she knows can only be pleased with blood, that she knows makes his opinion of his family twisted. Never of Talia, no, maybe he never called her mother, but she is sure he would never let her see him this way otherwise. Maybe it's because she saw him at his worst, once, but maybe, maybe she can dwell on maybes, for once, and hope that Jason does consider her his mother. Even if she could never replace his late mother, at least letting her help him with his plans is the most she can ask for.
With that, she understands Gotham, instead of being through reports, news, old tales from her beloved, it's from her son. Soon, it would be from both of them.
For now, until Jason creates his big reveal, finishes his plans, deals with whatever issues he wants to deal with, she will let him have Gotham to himself. She will keep her father away. She will continue doting on Damian, as she will tell him stories of her beloved, The Bat, and let his eyes shine. As she could not preserve her sons innocence, but she could try to ignite their hopes.