He didn't like how she was. His sister was much changed. More than he ever wanted to see her as. And she was ever the Trickster. "You remember how she was. I don't. I was...with the Vong, But I was told. She didn't cope well, Tenel Ka told me all of it and that's where she's from. She's more Yun Harla than Jaina and she's found her way into the arms of exactly the wrong person to pull her out of that. I'll give Jag Fel one thing, he did pull her free of herself. If you can do something though, if you can talk to her, if you can change how she's acting then you have to do that. Maybe that's why you're here? Maybe that's part of why the Seal brought you."
Be there for her and Anakin. Of course. Not for him. He couldn't ask that. He could never be her nephew again. He knew that. "Can I ask? Don't feel you can't talk to Tenel Ka or Allana. Particularly Allana, just because of me. I know she'll want to get to know you, she never really had a chance before and I don't want to be the reason she doesn't have a chance now. If that makes sense." He knew she'd be here to take care of those she cared about. Her family. Mara would look out for Anakin and Jaina in ways he never could have because it wasn't in him to do so anymore. He had changed so completely.
But this had helped. It was something that had to happen. It was a meeting that had to take place. But it had been hard. It was still hard, and when she dismissed him, Jacen nodded. "I'll take my leave then. I've said all I can say for now. And I'm always contactable. But you have no need to thank me for the meeting. I think gratitude is a little redundant from your side given our past. But we can move on from here. For the sake of the others and for the sake of us both I feel we must. It is good to see you here Mara." he said before finally shifting his gaze away, retrieving his lightsaber and walking away slowly.