The 21-year-old American model left little to the imagination in the racy bathroom shot, covering her modesty with just one hand and a bottle of body lotion.
The former couple share son Wolf, five, and daughter Saskia, four.
Her partner Reece is already father to two children with his influencer ex-fiancé Tammy Hembrow.
London gave birth to Stone on March 7 after a grueling 34-hour labour.
And London Goheen was up to her old skin-baring antics on Friday, as she went topless for a jaw-dropping Instagram snap.
But model and social media influencer London Goheen, 23, had fans doing a double take on Thursday when she posed in a nude optical illusion swimsuit which made her appear as though she was posing completely naked.