A mother accused of murdering three of her children by driving them into a Melbourne lake allegedly said she'd "rather take her own life and that of the kids" than see them live with her lover and his wife.  A woman, who cannot be named, claims she overheard Akon Guode make the comments before she drove into a Wyndham Vale lake last year.  She also says she saw Guode a few months later and asked her: "Did you really do it?"  "She said, yes I did it," the woman said in a statement, tendered in the Melbourne Magistrates Court on Friday.  "What I understood that to mean was that she had taken her kids' lives."  The witness claims Guode told her she "didn't expect to still be alive".  Mother-of-seven Guode is charged with murdering her 1-year-old son, Bol, and twins Hanger and her brother Madit, 4.  The 37-year-old is also charged with attempting to murder her 6-year-old daughter Alual, who survived after being pulled from the water on April 8 last year.  All four kids were fathered by Joseph Manyang.  He and Guode began an affair after she immigrated to Australia from Sudan and Mr Manyang left his wife in 2010.  The witness says she overheard Guode claim Mr Manyang's wife was threatening her.  "I could see that Akon was stressed and scared," the woman's statement says.  "Akon said she would rather take her own life and that of the kids.  "She said in a jealous kind of way that she didn't want the kids to go to (Mr Manyang) and the wife, that she wanted herself and the kids to go together, to end it."  The woman, who lives interstate, claims she has been pressured by the Sudanese community not to testify.  She was arrested on a warrant on Friday after she failed to appear at a video link facility to give evidence.  She was eventually cross-examined briefly by Guode's barrister, Julian McMahon, and was bailed to appear again on Wednesday, when her claims will be tested.  The court heard the woman suffered some mental health issues.  After initially claiming she couldn't remember, she also admitted she had previously been jailed over a serious assault in which a person was stabbed.  The woman didn't want to answer questions about herself.  "The evidence here, that's what I'm here for. It's not about my personal life," she said.  Guode says a dizzy spell caused the lake tragedy and Mr Manyang believes the crash was an accident.
An arrest warrant has been issued for a witness in the case of a Melbourne mother accused of murdering her three youngest children.