Sitting in the co-pilot's seat - in Chewie's seat - was a bit of a somber experience for Jaina. In fact, if the situation weren't already so dire and her mood affected so drastically by what was taking place, it would have surely been ruined for her now. However, she forced all thoughts of the beloved Wookie aside and focused on helping her father get them all to their destination in one piece.
She did, however, suck in a sharp intake of air through her teeth as she felt her uncle using the Force. Glancing at her father, she stated in a low tone, "He's right about that. Uncle Luke just did something, all right."
Already preparing herself mentally for the battle ahead, Jaina's only real concern at the moment was whether or not Jacen would allow enough of their bond to be present that they could work smoothly together without fail. She didn't care about the secrets he was hiding, or anything else really, at this point. She just needed to know that her twin was willing to put aside their issues - all of them - to deal with Kun once and for all.
C'mon, Jacen, she silently willed him to do the right thing. Your secrets are yours. I'm not going to pry. But I need you now, more than ever.