It's a horrible situation for anyone to feel so beyond hope that they would want to destroy themselves. I can understand the impulse completely, but it's especially troubling when it's a child or teen, whose brain functions haven't fully developed and can't understand the scope and permanence of what they're doing.
Obviously the young woman's behavior was ethically abhorrent. I can even see the young man's family having a legal case for some sort of financial criminal liability (which, like the current charges, seem to have no legal precedent.) But she wasn't cyber-bullying him (which I believe, like any bullying, should have criminal penalties.) Unless there's more to this case, and taking into consideration their ages, I can't see where the line was crossed to justify criminal charges for abysmal judgment.
An adult encouraging a teen to follow through with their suicide plan would spin this story very differently for me.