Sonic shifted in front of him, his face now entirely devoid of concern.  More worryingly, it was smothered with shock.  “You’re pregnant.”

“For the love of God, yes.”

Shadow is fine, he's just pregnant.  And he can't understand why Sonic can't wrap his mind around the whole baby concept.  He's the Ultimate Lifeform.  Of course he can carry children.  He actually thinks it's rather backwards that other males can't.