[ He's not sure if it's just her frustration bleeding over, or the frustration he's been feeling since he got here, or maybe the one is just feeding the other, but whatever it is, it's flaring up on his end, too. Because speaking of letting people down - ]

I know I'm letting people down. I promised my little sister there was totally no way I was going to go into space and not come back, and...here I am.

[ Not after his father already had. His family didn't need to go through that again. ]