Malin, who appeared in the second series of Love Island, told fans the devastating news on Instagram while urging them to help her raise money for Cancer Research UK.
The make-up artist said: "My mum has been diagnosed with breast cancer again.. Worst feeling in the world.. Going to be zero alcohol for me this month!! Please donate to such a good cause."
Malin has set up a Just Giving page and revealed how her mum beat breast cancer 15 years ago. She has also explained that her father passed away from skin cancer, while her uncle lost his fight to lung cancer too.
Writing on the page, she said: "So - for the whole of September I'm not drinking any alcohol. And for all my friends they know this is pretty hard for me haha!
"Cancer is close to my heart. My father passed away with skin cancer after battling it twice. My uncle passed away with lung cancer too..
"But more recently - my beautiful mum has been diagnosed with breast cancer and is having her operation on 14 September. She had breast cancer 15 years ago and fought through it and beat it - but now she faces it all again.
"She's my inspiration and my absolute life.. So please help donate to this amazing cause..
"I love you Mum! Lots of love.. Malin xxxxx."
To donate, click here.