Her emotions are easy to sense, partly due to the fact that his own mirror them; they are both angry at him for the measures he's been forced to take, to keep everyone safe. But he also feels when they slip away, leaving a disturbing absence in their wake. For a moment, Obi-Wan fears he's come too late. That Padmé has given up, but simply hasn't realized it yet.

He sees the knife as he cautiously enters, and it actually helps ease his mind. If she is still willing to fight to defend herself, hope isn't lost.

"I'm sorry," he murmurs, keeping his head bowed, eyes cast downward. Let her take his apology however she likes - he is sorry for his part in all of it. For Anakin. For hurting her. For forcing her into this existence. For showing up on her doorstep, a reminder of the life she used to live.

But she is all he has left of that life, as well. When her children are grown, they will have no knowledge of what came before them. They will not share any of the memories of the better times. Betrayal and heartbreak has occurred, but he has begun to remember other pieces of his life, and he clings to them.

He just hopes Padmé can see past the darkness, and remember it as well. He wants her to have hope.