He listened, he listened as well as he could - not wanting to interrupt, even though the more Raven talked the more questions he found he had. So apparently she had been abandoned too? Maybe that's why she did the same thing, he thought bitterly, but then reminded himself that he didn't know the circumstances. It was likely that she didn't abandon her son because of the way he looked, anyway.
"I can't...I just...wow." Brilliant statement! Kurt sighed, running his hands over his face, tiredly. "I think I am going to need some time to digest all of this. You're not...going anywhere, are you?"