Kim Kardashian shares a sizzling bikini snap with Kourtney as she celebrates her 39th birthday

Kourtney Kardashian turned 39 last Wednesday, and her entire family greeted her for the occasion.

Her sister Kim was one of the first to greet her on social media, sharing a photo of two of them during their recent trip to Turks and Caicos.

"Always got your back, sis!"

In the photo, the two sisters could be seen chilling on a pool-side sofa, with Kourt wearing a green bikini ensemble, and Kim in a camo bikini ensemble. The two eldest Kardashian sisters matched as they wore mini sunglasses as they posed for the photo.

They shared a couple of other photos from their luxurious beach trip, all without the youngest Kardashian sister Khloe, who was at that time expecting her first child with Tristan Thompson.

"Happy Birthday to my friend I’ve had the longest in my life! Wouldn’t know what to do without you! Have the best birthday ever!!!!"

Two days prior to her birthday, Kim threw Kourtney a simple birthday party.

The simple celebration seemed to have occurred in Ohio, when they visited Khloe who had just given birth to her first child True.

Khloe is currently taking care of her child with Tristan, amidst the cheating scandal they are currently in.

Kourtney and Kim traveled to Cleveland together with their younger sister Kendall Jenner to visit 33-year-old mom Khloe, who gave birth to True Thompson last Thursday.