Pete closed his eyes for a moment and swallowed. Did he have an idea? Not at the moment she asked, but now that she had, he could name at least a dozen without thinking too hard. The trick was to minimize the pain, duress and mess factors. He sighed softly and pulled away so she could see his face. He didn't quite look her in the eye.
"Before I came here, I worked for the Crown. All my adult life I have been a British Intelligence agent, until it came out that I was a mutant." His tone was matter-of-fact, informative even. There was no judgment one way or another in his voice, but a serene detachment. "Black Air, MI6. You name it, I was there. So... yeah, luv. I have ideas," he added lastly in a hushed voice. He looked away and licked his teeth behind closed lips. His mouth was dry all of a sudden.
"The most... humane... would be to sever the brain stem. Hardly any pain past the initial shock, and death is mercifully quick."
He failed to mention it was likely to be horrendously messy for those left behind to do the cleanup, but then he corrected himself. Actually, didn't he have access to solar heat knives that would fairly instantly cauterize any wound he made? He silently cursed his power for being so bloody and lethally efficient. "I... I could..."
He almost asked her to wait, to give it a day, but he knew he would be doing it for himself and not for her. She deserved better than that. "Are you sure about this?" he suddenly asked, tilting his head a bit while carefully studying Kira's face.