Adele Carles has quit the WA Greens, saying she could not work with senior party MP Giz Watson and fellow Green Alison Xamon because of the way they pushed her into revealing her affair with former treasurer Troy Buswell.
Ms Carles, who became the first Green to hold a Lower House seat in WA when she won Fremantle at a by-election last May, said she would sit as a Green independent and did not rule out running for the seat again at the 2013 State election.
Ms Carles repeated claims that her press secretary, Natacha Hammond, had been told by Ms Watson that if the Fremantle MP did not go public with the affair, she would.
Ms Watson denied the claims, saying that it was Ms Carles' decision to make the affair public.
But Ms Carles insisted that she was forced to ring Ms Xamon and beg her to call off Ms Watson after the long-serving Greens MLC had told Ms Hammond that she would go public with the story at 2.30pm on Friday, April 23.
"I rang Alison and I was crying, shaking. I said, 'Alison, I'm appealing for you to help me, I don't know how to stop Giz'," Ms Carles said.
"I said, 'You're a mother yourself. How would you feel if your kids found out this way and it went public and their schools all knew and their teachers knew?' I said, 'Please, I'm asking you to ring Giz and stop her going to the media at 2.30'."
Ms Carles claimed that Ms Xamon agreed to talk to Ms Watson if Ms Carles committed to going public about the affair, which she did that weekend.
But Ms Watson denied last night that she threatened Ms Carles and said the Fremantle MP was "a desperate woman looking for someone to blame".
"On Friday, that morning Adele had decided that she was going to go to the Sunday Times because that was the plan that we had agreed between all the State MPs," Ms Watson said.
"At no point was I going to do media on my own, nor did I threaten to do this on either Friday or any other day. (Ms Carles) is a desperate woman looking for someone to blame and I think it's about time she took some responsibility for her own actions."
Ms Carles said she felt abandoned by her fellow Greens MPs after going public and was disappointed with Ms Watson's comments to the media.
"I was pushed out there, they (the Greens MPs) all retreated and Giz just kept going to the media about it and she never said 'I support Adele'," she said.
The issue has split Greens supporters, with Ms Carles' Fremantle branch backing her to stay in the party but Canning Greens pushing for her expulsion.
"I feel I have no choice but to resign and just try and pick up the pieces and move forward as an independent Green for Fremantle," Ms Carles said.
She said she had told her husband and Mr Buswell of her decision, her husband declaring the issue a sideshow to the main concern of her family's wellbeing and Mr Buswell applauding the move.
Ms Carles said she had considered quitting politics but was encouraged by support from Fremantle.
"I could have just quit everything right now and walked away from it but I'm not prepared to do that because I know there are a lot of people in Fremantle who want me there," she said.
She said going independent would give her more freedom to comment across a wider range of issues.