started up plastic surgery rumors after she posted a very revealing photo on Instagram.
The 38-year-old uploaded a snap of her butt in a thong bikini
and many fans commented on how it looked fake!
Kourtney has been on a new fitness regime which includes daily workouts and has previously admitted to getting a boob job in the past.
The reality TV star is currently vacationing in Nantucket, MA with her three kids and a few girlfriends.
No sign of much younger boytoy Younes Bendjima. The pair just returned home from a luxurious vacation in St. Tropez, France.
What do you think about Kourtney's posts?