Annette Creegan was formally identified by Norfolk Police after her body was found in the River Bure on the Norfolk Broads on Sunday.
Detectives believe she was dead before entering the water, probably as the result of strangulation.
Her partner, named locally as John Didier, died as the result of drowning. His death is not thought to be suspicious.
Police launched a search for the bodies after finding a 13-year-old girl alone on a boat after a hire company alerted police that the vessel had not been returned on time.
For more on this story visit the ITV News Anglia website.
More top news
The mother of a former altar boy who tried to blow up a train insisted he was 'a big softie' who didn't want to hurt anyone.
Its current five year licence comes to an end next Tuesday.
Extra armed police will guard major sporting events in London this weekend after the military was drafted in to protect key locations.