1. The Australian woman who attacked her husbands, killed her  last one and served him as dinner for his kids

 The first Australian woman to be sentenced to a natural life term  without parole, Katherine Knight, had a history of violence in  relationships. She mashed the 
dentures  of one of her ex-husbands and slashed the throat of another husband's  eight-week-old puppy before his eyes. A heated relationship with John  Charles Thomas Price became public knowledge with an Apprehended  Violence Order that Price had 
filed  against Knight. She stabbed Mr Price 37 times with a butcher's  knife before skinning him and hanging his hide from a meat hook in their  lounge room back  in 2000. She then decapitated him and put his head in  a pot on the stove, baked flesh from his buttocks and cooked vegetables  and gravy as 
side dishes to  serve to Mr Price's children. Police found the macabre dinner before  the adult children arrived home. 
(Link 1 | Link 2)
2. The woman who killed both of her husbands and then framed  her own daugther

 In 2005, Stacey Castor, 41, used a kitchen baster to give antifreeze to  her second husband David Castor over a four-day period, and then staged  the scene to make it appear a suicide. Investigators found he had  ingested ethylene glycol. Suspecting his wife, they exhumed the body of  Castor's first husband, Michael Wallace, who died in 2000 of a 
heart attack. Chemical analysis showed  that his body contained ethylene glycol as well. This threw more  suspicion on Stacey Castor, but she had a backup plan. She arranged  evidence to point the finger at her own daughter, Ashley! Castor accused  her teenage daughter of killing both her father and her stepfather,  despite the fact that Ashley was only eleven years old when Michael  Wallace died. In 2007, Ashley Wallace was hospitalized for an overdose  of prescription pills and vodka. There was a suicide note in which she  confessed to the murder of her stepfather. The only problem was that  Ashley survived to testify against her mother at her 2009 trial. Castor  faces 25 years to life for the murder of David Castor and the attempted  murder of Ashley Wallace. 
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3. The empress who traded as prostitute to cheat on her husband  and later planned to kill him with one of her lovers
 Valeria
 Valeria Messalina was the third  wife of emperor Claudius. She was notorious for being an absolute  nymphomaniac. She married Claudius in A.D. 38 and bore him two children,  who were rumoured to have actually been fathered by Caligula as she was  a frequent attendee to his many banquets and orgies.  After Caligula  was finally murdered, Messalina, although now empress, did not suppress  her urges. At night she would even dress up as a prostitute and  incognito she would trade as a prostitute - such was her insatiable  appetite for men. She once challenged the famous Roman prostitute,  Scylla, to a sex-athon, whereby the winner was the one who copulated  with the most men. The competition lasted for 24 hours and Messalina won  with a score of 25 partners.
In 48 A.D. she plotted with one of  her lovers, Sillius, to have Claudius murdered and even had a secret 
marriage ceremony with him. However,  one of Claudius's advisors Narcissus, exposed the plot to him. Claudius  was heartbroken and could hardly believe his own ears, but was  eventually persuaded to have her and Sillius promptly executed.  Messalina was given the option of suicide but she could not bring  herself to take her own life. 
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4. The woman who bit her husband's penis off

 A furious wife bit off her hubby's manhood after waking up to find him  in a clinch with her best friend. Katya Kharitovonova, 36, was jailed  for two years for the wounds she inflicted on hubby Mikhail, 40, and his  lover Liza Dmitriyeva, 33. The Russian couple had gone for a walk when  they met Katya's pal Liza and invited her home for a meal.  After  eating, they settled down to watch HG Wells movie The War of the Worlds –  but Katya fell asleep. 
After half an hour, Katya woke up to  find her husband half naked and her best friend performing a sex act on  him. Katya immediately seized a 
floor  lamp and crashed it over Liza's head before biting and severing  her husband's penis. Realizing the seriousness of the wounds she  inflicted, Katya called an 
ambulance  and the pair was taken to casualty at a nearby hospital. Liza suffered  severe concussion while Mikhail's willy had to be stitched back  together. 
Katya faces two years behind bars in a labour camp.  The judges told her she had no right to act in such a violent manner  despite the provocation by her husband and best friend.  
(Link) 
5. The woman who cheated on her husband after he had  donated his own kidney to her 

 Dr Richard Batista married Dawnell Batista in 1990. Back in 2001, after  two previous transplants failed, Batista proved to be a match to his  wife, so he duly offered up one of his own 
kidneys. After the successful transplant, Dawnell  survived but not as so their marriage, which lasted only another four  years. Dawnell viewed the 
kidney  as a new lease on life. She returned to school to earn a master's 
degree in nursing, and took up karate.  According to Richard, his wife repaid his gesture by first sleeping  with her physical therapist - and then denying him access to their three  kids in an increasingly bitter divorce. 
The heartbroken doctor  is now requesting the one-time love of his life to pay $1.5 million for  the organ he donated. He insisted his cash-for-kidney claim was a direct  result of his wife's behavior.  
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6. The woman who accidentally hanged her husband to death  during a sex game

 Tony, 46, and Crystal Boarder, 31, his partner of about 10 years, used  to be engaged in "kinky sex games" of bondage and asphyxiation. They  performed acts of suffocation with plastic bags and sheets, drownings in  the bathtub and hangings in their barn. The couple even videotaped  themselves taking turns hanging each other in the barn next to their  house outside Rockwood. First, Crystal Boarder was hanged by her husband  and let down. Then, Tony Boarder placed the rope around his own neck  and she hanged him. He told her to lower him and then quickly lost  consciousness. Crystal Boarder slowly brought him to the ground over a  period of about 15 minutes. For the next 40 minutes, she checked his  pulse and smoked cigarettes. Later that morning, Crystal Boarder called  the police and said she had accidentally killed her husband during a sex  game.
Tony died of asphyxiation during the hanging. In a strange  twist, he had once killed someone during a dangerous sex act and was  convicted in 1987 of manslaughter. He was sentenced to eight years in  jail for causing the death of a 19-year-old woman by strangulation  during sex. 
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7. 76-year-old lady who is suspected of murdering four of her  five husbands

 Jeff Carstensen was spooked when he learned his grandmother planned to  buy him a $100,000 life insurance policy -- and name herself the  beneficiary. As he and many others who came into Betty Neumar's orbit  have learned, bad things tend to happen to the people around her.
The  76-year-old Georgia woman is in a North Carolina jail, accused of  hiring a hit man to kill her fourth husband Harold Gentry. Authorities  are re-examining the deaths of her first child and four of the five men  she married, including Gentry. No motive has been discussed, but records  and interviews with relatives and police officials paint Neumar as a  domineering matriarch consumed by money. She collected at least $20,000  in 1986 when Harold Gentry was shot to death in his home. A year  earlier, she had collected $10,000 in life insurance when her son died.  She also had a life insurance policy on husband No. 5, John Neumar, who  died in 2008. The official cause of death was listed as sepsis, but  authorities are investigating whether he was poisoned. 
To the  outside world, family members said, she was Bee -- a friendly woman who  operated beauty shops, attended church and raised money for charity. But  Carstensen saw another side: fist fights at family functions, use of  obscenities and belittling of relatives, how she would act "one way in  public -- especially church -- and another behind closed doors." Police  in Ohio are looking into the death of Carstensen's stepfather, Neumar's  son Gary Flynn, who was found shot to death in his 
apartment in November 1985. It was ruled a suicide,  but his family has questions.  
(Link)
8. The woman who chose a pet crocodile over her husband

 An Australian woman, Vicki Lowing, divorced her husband after he asked  her to give up her pet crocodile, Johnie, which is "like a child" to  her. Mrs Lowing, 52, who has hand-raised the one-and-a-half metre  reptile for 13 years, gives it the run of the house and even lets it  sleep with her son Andrew in his bed. Victoria adopted the crocodile  after it was left on her doorstep in 1996 by an anonymous person. Her  husband Greg said she spent too much time with the pet and asked her to  give it up in a bid to save their marriage, but she refused and the  couple divorced in 2005. Mrs Lowing, a trained nurse, said: "Husbands  can look after themselves but my crocodile can't make his meals. " 
(Link)
9. The Saudi woman who dumped her husband because he tried to  sneak a look at her face after 30 years of marriage

 A Saudi Arabian man lived with his wife for 30 years without setting  eyes on her face. His 50-year-old wife followed the tradition of her  native village near the south-western city of Khamis Mushayt and kept  her features veiled at all times. One night the husband was overcome by  curiosity and tried to lift his wife's veil as she slept to take a look  at her face. It was an error he is unlikely to be given a chance to  repeat for his outraged wife woke up during his sneak peek and decided  to demand a divorce.
The betrayed wife said her husband  apologized and promised never to do it again, but she insisted she  wanted a divorce. It may seem odd, but cases of Saudi husbands with  wives forever shrouded in mystery are not uncommon. 
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10. The woman who attacked her husband with frozen lasagna

 An Atlantic Beach woman was taken into police custody after  investigators said she used frozen lasagna to serve up violence instead  of serving it for dinner. Amanda Trott is charged with domestic battery  after police said she attacked her husband with the frozen food during  an argument.  Mr. Trott claimed that Mrs. Trott had slapped him across  the face several times and threw a frozen lasagna at him that struck him  at the top of his head.  The incident began when officers were called  to the Sea Oats Apartments after neighbors called them with concerns  about the Trotts' children. Police confronted the couple and Amanda  Trott eventually confessed to hitting and attacking her husband. The  Trotts' children have been placed in the care of a neighbor. 
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