Kylie Jenner's birthday milestone has taken on a life of its own. In the midst of celebrating with pals and boyfriend Tyga in Punta Mita, Mexico, the reality star gave her Instagram followers a close-up of their vacation [1] on Friday. In the snap, Kylie lounges near a pool in a revealing one-piece bathing suit. "Relax w meee," she wrote. Earlier in the week, the group soaked up the sun on a boat day [2].

Kylie turned 18 on Monday, Aug. 10, but the reality star has been celebrating the big day for more than a week now. The festivities kicked off with a dinner with her family [3] on Friday, Aug. 7. She followed it up with an over-the-top bash in LA [4] on Sunday, Aug 9. Keep reading to see Kylie's Instagrams from her action-packed vacation, and then check out her raciest snaps [5].

Kylie and her friends struck poses on the beach before hopping on a jet ski.

Kylie flaunted her physique while basking in the sun in a barely there black swimsuit.