30-year-old Kaitlynn shared a photo from her Lake Como getaway with Miley Cyrus, which shows the pair looking smoking hot in swimsuits while aboard a boat.
The post, which was captioned, “Rock the boat, don’t rock the boat baby,” caught the eye of none other than her 35-year-old Jenner.
“Hot girl Summer," Brody wrote alongside a flame emoji.
Carter's Italian vacation comes just one week after The Blast confirmed her split from Jenner after a year of marriage.
Miley and Kaitlynn are away at Lake Como with the singer's older sister, Brandi, for a "Girls trip," which Brody's ex says is "the only kinda trip."
The trio have made an escape overseas together following the news Kaitlynn and the notorious playboy have broken up.
And while it's awesome to see the girls together ... nothing outshines Miley Cyrus seductively rolling her hips to Aaliyah's 2001 hit, "Rock The Boat."
Brody and Kaitlynn just revealed their separation, only 1-year after their Indonesian wedding.
It was also revealed that upon returning to the United States, they never obtained a marriage license or certificate, and thus were never actually legally married.
In a statement from the celebrities' rep, they stated, "Brody Jenner & Kaitlynn Carter have decided to amicably separate. They love and respect one another, and know that this is the best decision for their relationship moving forward."