Both the initial remark and Carter's response have since been deleted, but according to Entertainment Tonight, the comment was left on a recent bikini photo the "Hills: New Beginnings" star posted. The comment read: "Oh [Kaitlynn] u look too thin r u ok you are so beautiful hope all is ok it was nice to see you healthy for a bit modeling it was normal it seems like the new norm is being shown as super thin is only exceptional."
"I mean I been through some shit lately LOL," replied the 31-year-old model.
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Indeed, it's been a rough couple of months for Kaitlynn, who split from husband Brody Jenner in August after a year of marriage that was never made legal. Carter then found herself locking lips with Miley Cyrus, 26, who had just announced her separation from husband Liam Hemsworth, 29.
The ladies went on to date for over a month before going their separate ways in late September. Almost immediately, Cyrus was linked romantically to 22-year-old Australian musician Cody Simpson, and Jenner began dating 22-year-old model Josie Canseco.
On top of that, Brody just confirmed his split from Kaitlynn would be documented on Season 2 of "The Hills: New Beginnings."
"I'm sure you're going to see a lot of that," he told ET. "Of course, you have to stay tuned to see what goes on with that, but you'll definitely see some of that."
Jenner, who starred in the original MTV reality series as well, expressed how he became comfortable with people knowing details of his private life.
"'The Hills' was one of those things where, it's tough to put yourself out there like that, but ultimately, it can be very therapeutic as well," he explained. "To put yourself out there and leave yourself open for judgment can also be helpful to your daily life and moving forward in how you grow up. There's a lot of times you get people that'll tell you, 'Don't do it. It's a reality show.' But you gotta be yourself and just do it."
The 36-year-old reality star was also asked if his current relationship Josie will be a part of Season 2.
"I can't answer that at this time, to be completely honest," he replied. "Everything is kind of up in the air with MTV about who's going to be on the second season."
"There's no preparation for the kind of things that they throw at you. If you prepare for something, they'll throw a complete curveball," he continued, adding that there were things that "came out this season that I didn't feel was anyone's business."
"But obviously, the way 'The Hills' is, they pry and they go in and they want to know all this shit that you don't want them to know," Jenner added. "It's a process, but like I said, ultimately we signed up for this for a reason, and it's to let people into our lives. And you need to respect that and you gotta play ball."