Just so we can put this "domestic relationship" issue to rest, here is the Arizona Statute regarding what qualifies:
13-3601. Domestic violence; definition; classification; sentencing option; arrest and procedure for violation; weapon seizure
A. "Domestic violence" * * * *
1. The relationship between the victim and the defendant is one of marriage or former marriage or of persons residing or having resided in the same household.
2. The victim and the defendant have a child in common.
3. The victim or the defendant is pregnant by the other party.
4. The victim is related to the defendant or the defendant's spouse by blood or court order as a parent, grandparent, child, grandchild, brother or sister or by marriage as a parent-in-law, grandparent-in-law, stepparent, step-grandparent, stepchild, step-grandchild, brother-in-law or sister-in-law.
5. The victim is a child who resides or has resided in the same household as the defendant and is related by blood to a former spouse of the defendant or to a person who resides or who has resided in the same household as the defendant.
6. The relationship between the victim and the defendant is currently or was previously a romantic or sexual relationship. The following factors may be considered in determining whether the relationship between the victim and the defendant is currently or was previously a romantic or sexual relationship:
(a) The type of relationship.
(b) The length of the relationship.
(c) The frequency of the interaction between the victim and the defendant.
(d) If the relationship has terminated, the length of time since the termination.