The incident occurred in July.
Already earlier in the day, the police were at the address in Kungsbacka after a fight between the spouses, who were drunk.
When the patrol was alerted there again, the woman had attacked the husband with a knife.
The woman is sentenced to seven years in prison for assault and attempted murder.
She has admitted that she threatened the husband by getting a knife, but denies that she would have stabbed him with the knife and threatened to kill him.
According to the woman, the fact that the man was stabbed in the arm was an accident.
The man survived without serious injuries but was taken to hospital.