The mutated gene meant the former Liberty X singer was forced to undergo a hysterectomy and double mastectomy. Despite having recovered amazingly well from her operations Michelle still has worries about the effects her health may have on her family.
The gene, which can lead to cancer, is hereditary so there's the potential for her children to be diagnosed with it one day – forcing them to have to make similarly tough decisions to Michelle in the future. Speaking to MailOnline mum of two Michelle revealed her anxiety at the thought of having to explain what being tested positive for the gene would mean to her children Faith, four, and Aaron, two.
'It scares the living daylights out of me. Who wants to have that conversation with their daughter or son?' she said. 'Both of them have the same risk of inheriting the gene.'
'So I have to at some point face up to the fact that I have to have that terrible conversation with them, and that they may have to make decisions I had to make.'
'There's obviously a 50% chance she'll (Faith) have to undergo what I went through,' Michelle said, adding: 'There's no point in worrying her and creating any stress in the family that's not needed till the time comes'.
Michelle made the decision to have a double mastectomy in 2012 when she discovered the mutated gene meant there was an 80% chance she would develop breast cancer.
Two years later the brunette beauty took the brave decision to also undergo a hysterectomy, meaning she couldn't have any more children, because her chances of developing ovarian cancer was as high as 30%.
In her interview Michelle also revealed that her children often ask whether she will have any more babies, but that she's just as honest as she can be with them. 'When Faith talks to me about having a brother or sister I tell that I can't have anymore children,' explained Michelle, adding: 'She's never asked why yet though.'
'But the time will come [when Faith asks] I'm sure, probably sooner than later because of the internet, so I will tell her when she asks me a direct question about it.'