DailyMail – The 34-year-old woman, who has not yet been named, told officers in Atibaia, near Sao Paulo, that she had first teased her husband into getting into bed with her.
But after tying his arms and legs to the bed, she pulled out a razor and hacked off his manhood, according to local media.
After taking a picture of the severed organ, she flushed it away down the lavatory, she confessed on December 22.
When she later handed herself in to police she told them she had flushed it away because she had ‘heard that it was possible to reattach it’.
Earlier she had walked into her local police station with her brother and told them: ‘Good evening, officer, I came to introduce myself, because I just cut off my husband’s penis.’
Her 39-year-old husband, also unnamed, was found alive and rushed to hospital but his current health condition is unclear.
His wife is in custody and has been charged with attempted murder.
The investigation is ongoing and police have not commented on the woman’s claim that he had sex with her niece.
The age of consent in Brazil is 14, and police are also looking at whether any relationship was consensual.