It only takes the sound of his family name to cow him. He knows that Sylar is right. Matt won't give up, he won't back off. He's never going to leave him alone and the moment he can, Sylar will be ripped from his mind without consent. Or he'll persuade Mohinder into thinking that the man he loves is a monster.

Oh God, but he is a monster.

Mohinder watches as Sylar turns back to Matt. It's for the best. He's just holding on to something he doesn't need. Mohinder is getting good at convincing himself of anything Sylar wants him to think.