Kill her. She's a mutt. A stinking mutt that was created to kill you.
"What do you want for lunch Peeta?"
Her back is turned right now. Just take a knife from the drawer and drive it through her back. She'd do the same thing to you.
"Would you like lamb or turkey on your sandwich?"
Kill her.
"Peeta?"
KILL HER NOW!
Katniss turned around to face him and she gasped. "Peeta!"
He clutched the back of one of their kitchen chairs. His grip was so tight that each of his knuckles stood out white against his skin. His breathing was shallow and his blue eyes were crazed. "You're a mutt." He said in a strained voice to Katniss. "Real or not real."
Katniss took a cautious step towards him and said in a calm and soothing voice, "Not real. I'm not a mutt. I'm Katniss Everdeen, human citizen of District 12, winner of the 74th Hunger Games with you, participate in the 75th Quarter Quell, Mockingjay in the Rebellion, and your fiancée." She rattled off the information as if she said it every day.
Peeta visibly relaxed as she said the information. Katniss took a slow step towards him and he closed the gap between them. "I'm sorry." He whispered into her hair. "I'm sorry that I have to get you to say all of that each time I…"
"It's okay." She whispered back into his chest. "If it keeps you here with me I'll do it thousands and thousands of times more."
She didn't notice him stiffen at that prospect. He didn't want to have her have to prattle off that information thousands and thousands of more times. He wanted the memories to be erased and his past forgotten. He wanted to be able to siphon all of the bad memories and created dears from his mind and Katniss'. He wanted them to have a normal relationship where he didn't have to ask "Real or not real" every time he became confused and Katniss didn't have to make a list in her head or wake up screaming from a nightmare.
But none of that could ever happen.
Because he was Peeta Mellark.
And he had been hijacked.