The reality star kept a low profile over the last month while she settled into motherhood with a baby Northwest, she gave birth on June 15.
But the 32-year-old allegedly said when she tried to go incognito in his car nanny in Southern California.
The observer told Radar Online: 'Kim looks amazing, it really does. She dropped a lot of weight baby already.
"Do not say that it is still no way to go, but she looked slim and burned. 'Kim and her boyfriend Kanye West has yet to give the world first saw her baby and the star has done what no one has caught a glimpse while walking.