According to the indictment, the woman intentionally set fire to the bedroom in the man's house on the night between the first and second of May this year.
The risk of spreading was great and the prosecutor believes that it was a danger to the man's life and health.
No one was injured in the fire, which was quickly discovered.
The woman, who is in her 20s, was arrested shortly after the incident and is now being prosecuted on suspicion of attempted murder and arson.
The woman has, according to the indictment, admitted certain facts of the incident.