Model-actress Kelly Brook's former fiance David McIntosh says she's a beautiful woman, but she can be nasty too.

The bodybuilder and former marine, who dated Brook on and off for over a year, has claimed that she mentally abused him, reports femalefirst.co.uk.

`Bullying isn't about physical strength. It's mental. I'm a hard man, but when I love someone I let my guard down and people exploit that,` The Sun newspaper quoted McIntosh as saying.

`She was everything that I wanted. And then it turned sour. That's what's so shocking. She's a beautiful woman, but she can be nasty too," he added.

The 29-year-old got engaged to Brook, 35, in 2014 after a whirlwind 11 week relationship which even saw them move here together.

However, just six months later they called time on their romance before appearing to get back together on numerous occasions.