The full-back, 34, is back in the UK and according to pals is 'barely speaking' with Annie, who is still unable to forgive him and move on from the footballer's affairs with Lauryn Goodman, 34.
Sources close to Ms Goodman, who has two children with the England international, say she is in the early stages of the book and has been hunting for a ghostwriter.
The wife of Kyle Walker was spotted attending Tanya Bardsley 's Mental Mummies charity luncheon at Mottram Hall in Cheshire on Friday, just hours after the news.
The model, 31, was meant to be flying out with their four children to see the England star, 34, make his debut with AC Milan this weekend, after his loan move from Manchester City.