[ He smiles weakly and squeezes her hands. It's a pretty heavy thing to tell anyone, even a master of mindless bliss. And it's an especially heavy thing to be telling his timeline twin. ]

I'll have a lot of catching up to do. Don't leave me too far behind, okay? And you have to tell me everything that happens while I'm gone!

[ But he won't let himself be too down about it, because... even if he's not completely sure his mother will get her heart back, or if he'll even get back his, the first step has to be for him to give up the heart he has now. ]