The best way to assist your wife is to help her secure an experienced criminal defense attorney. If she cannot afford a private lawyer, she should apply for a public defender. Good luck.
While I agree with Mr. Keller's advice in terms of what your ex needs, my strong sispicion is that your not motivated by a desire to help her under the circumstances. My response is accordingly premised on a belief that you feel your ex needs/deserves punishment. On the posted facts that's where my sympathies would lie. Predictions about punishment are impossible without very detailed information about the crime, defendant's entire background, the judge, and the prosecutor. The situation seems to beg for real punishment, but that will be determined by people and forces larely beyond your control. You can/should make known to police/prosecutor/judge what your feelings are in the matter. Start with making yourself perfectly clear to the police and work from there.
i answered this on lawyers.com. same answer. I don't know the court dynamics-judge, DA, etc., out there in camp hill. if I had to guess, no jail time, but it is possible. your wife needs a good lawyer to explain her situation to the judge and should have a good record of therapy/parenting sessions before she appears before the judge.