Kylie Jenner brought the heat on Instagram in what might be her sexiest bikini photos to-date.

Leading up to the launch of the star's Kylie Cosmetics x Grinch collection, Jenner, 23, slipped on a revealing cherry colored red thong bikini and posed for some racy photos on her sunchair by the pool.

With her backside facing the camera, the makeup mogul seductively leaned back and flaunted her curves, which she oiled up with her Kylie Skin SPF Oil that sat on a table nearby.

While Jenner captioned the photos reminding her fans about the upcoming Kylie Cosmetics launch, her loved ones — including ex Travis Scott — couldn't help but comment on her appearance in the pics.

"Heavvvyyyy 🏊🏽‍♂️🏊🏽‍♂️💧," Scott, 29, wrote with a swimmer and water droplet emoji.

Jenner's best friend Stassie Karanikolaou also commented saying, "mami🤤🤤🤤🤤." Beauty influencer James Charles simply said, "hot."

Although Scott has gotten flirty with Jenner in her Instagram comments, a source recently told PEOPLE that the couple is not back together.

"There’s a lot of love between Travis and Kylie, and they’re even openly affectionate," the insider said. "But they’re not back together and neither is in a place to be in a committed relationship."

The source says that Jenner and Scott — who share 2-year-old daughter Stormi Webster — have "both been dating here and there and are mature about that." But for now, the former couple is "really happy co-parenting Stormi and are on the same page about raising their daughter."

However, their family could anticipate a romantic reconciliation on the horizon. "None of their loved ones would be surprised if they eventually ended up back together, but it’s not happening right now," the source said.

Jenner and Scott split in October 2019 after two years of dating, but remain friendly and often spend time together as they co-parent Stormi. The mother of one has previously said she and Scott are "like best friends."