Kate Hoey has said the outcome of last night's Commons vote - in which MPs voted to take control of the Brexit process - has "threatened" the UK's chances of leaving the EU.
A majority of 27 voted to wrest control of the Brexit process from the hands of ministers yesterday evening, in order to put forward and vote on a series of alternatives to the Prime Minister's deal.
"We are in a situation now where you could say Brexit is actually threatened," Ms Hoey told talkRADIO's Julia Hartley-Brewer.
"The Prime Minister made it clear yesterday that even if something goes through that she doesn't really like, or the government doesn't want to implement, then they don't have to do it - and she's right on that."
Appearing on the breakfast show, the Labour MP and Brexiteer revealed what she would do if she were in Theresa May's shoes.
"If I was Prime Minister I would simply say 'We've had enough, we're leaving, we'll work it out, all the difficulties that might come from WTO', but ultimately it would give us our independence," she added.
"We've had all these motions and votes but the only legal thing was that we're leaving on March 29."