Depends upon the state. Here with no criminal record it would be doubtful if you would even see a Judge. It would be termed a property crime and diversion would have you paying for the damages and the diversion administrator might have you do some community service work. Completed diversion will erase the record-if there are no other problems you have failed to tell me.
Now- Was she inside the car or the house? I'm assuming the house so it will be difficult to procure a domestic summons. Were you on public property when you committed the crime-the street? The reason this is ask is if you were on the property that the incident occurred it would be trespassing as well.
If a marriage is going to break up it is imperative that you both get experienced lawyers and protect your rights. The hurt and sadness you feel now will be replaced in a few years with anger that you threw away your rights and signed something you didn't understand.