A 31-year-old woman from Mesa, Arizona, was arrested earlier this week after stabbing her boyfriend in the back when he threatened to leave her.

Betty Deharo, who brought a Cadillac for her boyfriend two days ago, could not control her anger when he started to pack his belongings to leave in the same car. Police booked Deharo on suspicion of aggravated assault and criminal damage Tuesday at 4 pm.

According to local newspaper reports, Deharo was standing over the victim with the knife in her hand at her home in Mesa. The boyfriend, whose name has not yet been released, was found bleeding from a wound on his back.

Police ordered Deharo to put the knife down and the victim was admitted to a local hospital and is said to be in stable condition.

According to police, the couple have been together only for a few days and the accident is still under investigation.