Mezhgan Hussainy is to reveal all about her relationship
The 36-year-old make-up artist - who met the music mogul while working on `American Idol` - is reportedly planning to write a tell-all autobiography detailing every aspect of her life, including their romance.
A friend told the Daily Express newspaper: "Simon is such a big part of her life that he will definitely get a mention.
"Simon is very private when it comes to his personal life so he might be hovering over the laptop when Mezhgan writes her final chapters."
The book will also include details of her childhood in Afghanistan and explain how she had to flee the country with her family.
The pal explained: "Mezhgan really is an amazing woman. She went through so much as a child but she remains full of optimism and positivity."
It would seem the brunette beauty is a good influence on 50-year-old Simon.
His fellow `Britain`s Got Talent` judge Amanda Holden recently said he has become easier to work with since falling for Mezhgan.
She said: "He`s a different man - more giggly, naughty and silly. Trust me, this girl is `The One`.
"Simon`s a better boss when he`s in love because he just wants to go home, which means we get off earlier."