The 32-year old 'Kourtney & Kim Take Miami star' captioned the self-taken shot as "baby love", reported Us magazine.
Kim has been constantly taunted for her weight ever since she announced that she is expecting her first child with Kanye West this summer.
However, recently Kim has been sporting more maternity wear, which flatters her new body more than trying to squeeze into clothes that no longer fit her bump.
"Finally accepting her body and getting more comfortable," a source said.
"I think it's really cute. Now that my belly has popped a little bit, you can really see it, and it's really, I think, a sexy thing," said Kim.