Hi Minx, not sure what the charge is in your state, but when JJ broke into our home and took jewelry, cash and other things AFTER he had moved out, they charged it as burglary. That is a strike in California. The Jail time was 5.5 months in jail, then a court ordered rehab (which we did not get to pick) and then 3 years probation. That is due to the plea deal when he plead guilty and the fact that we were the victims.
If they proceed with robbery (if anyone was present in the home, they could call it robbery), the charge may be more extreme.
If they go with the grand theft, that is generally no more than 3 years in state prison, but on first offense they would probably work a lower plea.
If you press charges, then she will be arrested, arraigned, and then the DA will let you know what they want to do, and since it is family, you may be able to try and get a rehab with probation.
You wont know if you don't choose to have her arrested for the crime and then let the legal system come in.