Sharon Harry was arrested and charged with aggravated assault and weapons charges after Friday's alleged incident. The man survived but suffered a 'serious injury' in the attack.
Trenton police would not identify the man, but confirmed that he was Harry's boyfriend. He was still conscious and coherent when police arrived at their home on Pearl Street.
He told officers what happened before he was taken to hospital, prosecutors said in a bail hearing Tuesday.
The Trenton woman faces aggravated assault with attempt to cause bodily injury with a deadly weapon, possession of weapon for an unlawful purpose and unlawful purpose of a weapon.
Harry's attorney told the court that the attack was out of character for the woman. She has no prior record.
The Supreme Court judge ultimately reduced her bail to $10,000 from $25,000.
The boyfriend was still being treated Tuesday morning.