The What Happens In Vegas star snapped Moore bending over while in the bathroom and uploaded the image to his Twitter page under the heading: "Shh don't tell wifey."
"Watching my wife steam my suit while wearing a bikini. I love God!," he wrote, later clarifying his remark with "I'm not wearing the bikini, she is, that's what makes it so glorious."
Replying on her own Twitter account, Moore wrote: "He is such a sneak and while I was steaming his suit too!"
It is thought that the photograph was taken as the couple prepared to attend Moore's ex-husband Bruce Willis's wedding to model Emma Heming on the Turks and Caicos islands on Saturday.