No, she wasn’t using reverse psychology. He had already started filling the truck cab with carbon monoxide and then got out of the truck because he was having second thoughts when she told him to get back in because he needed to take his life that night. Their texts make it clear that she was bullying him and preying on his depression to make sure he killed himself that night.
this was an act of comission, not an act of omission. She actively conducted herself in behavior that demonstrated a depravity to human life. That is a crime. She knew it by confiding in an e mail that said if they find our texts she can go to jail. Enough for the prosecutor to go forward. Pray for a conviction.