Gatineau Police say at this time they cannot make a direct link between the 42-year-old woman found dead in her Aylmer home and the 49-year-old man they've questioned.
Constable Pierre Lanthier says that's because the process of identifying the body still isn't complete, as they're waiting for the results of an autopsy scheduled for Tuesday in Montreal.
Homicide is not being ruled out and the man questioned remains in custody in Hull.
Police were called to Symmes Street on Sunday night.
Investigators are set to meet Tuesday morning to determine what charges could be laid.