Peter Mui, 54, and the victim’s husband -- Mui's former business partner -- had gotten into an argument late Sunday night, responders said.
The 41-year-old woman intervened and was stabbed at least five times outside 23 Main Avenue, they said.
Mui was being held in the Bergen County Jail, charged with attempted murder, aggravated assault, making terroristic threats and weapons counts, records show.
The victim remained hospitalized.
The Bergen County Sheriff's Bureau of Criminal Identification collected evidence, including the knife used in the attack and a vehicle, responders said.
Wallington detectives are the lead investigators, assisted by the Bergen County Prosecutor's Office.
Mui lists himself on LinkedIn as a phone company technician and a luxury car rental company employee.
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