Well, now he's gone and tipped his hand, hasn't he? David can sense the panic is Paige's mind, so he decides to just be done with it. He takes a deep breath, and begins his explanation.

"Not directly, but...well...I'm not exactly sure how ta say this, but...the reason you've had such a miserable time o' things is...because o' me."

He holds his hand up before Paige can say anything, so that he can continue.

"See...thing is, I've more powers in my li'l pinky than most do in their whole body, an' among those powers is the ability ta change reality. I...went back in time about a decade ago, because I thought I could change history for the better. Only problem is...I stepped on a pretty big bleedin' butterfly, an' it brought the world you live in into bein'."

He sighs, and pinches the bridge of his nose.

"I know who you are, because I'm the reason you exist. My name's David Haller, I'm...the only son of Charles Xavier, an' I killed him, tryin' ta make the world a better place. You exist because I failed."

David braces himself, all other defenses down, prepared for Paige to hit him, for revealing the fact that he was the origin of her misery.