The former model, 35, posted the pics on Twitter, including one of her cuddling daughter Princess and another of her holding baby son Jett Riviera.
She boasted about the amazing weather in Cape Verde to her followers and took time out to praise the resort she and the children are staying in.
Katie showed off her amazing figure in a colourful two-piece, looking fresh-faced and relaxed on what is Jett’s first holiday abroad.
In true Pricey style though, Katie included some cheeky bum pictures in her uploads, with the caption: “Tanning my a** off in Cape Verde.”
Husband Kieran Hayler and other sons Harvey and Junior were absent from the pictures.
Meanwhile, Katie was followed on Twitter this week by Paralympic Oscar Pistorius. She returned the follow, which is thought to have come after she addressed his trial for the murder of his girlfriend in her magazine column.
She wrote: “Either it was a tragic accident due to Oscar believing Reeva was a violent house intruder or it was a domestic fallout.
“The fact that cannot be exchanged is that Reeva was killed. The only person who knows exactly what went on is Oscar himself.”