The mum-of-five shared a string of snaps of her kissing and cuddling her seven-month-old daughter as they played together in the spring sunshine while on holiday.
In one pic, the 36-year-old is wearing a bikini as she plants a smacker on Bunny's plumptious cheek.
Katie posted another snap as she sat with her back to the camera in a patterned two-piece, as 18-month-old son Jett laughed up at her.
Flashing her butterfly tattoo, the star appeared totally relaxed as she sat cross-legged on the grass in front of her son.
She wrote: "My gorgeous Jett looking at me posing haha."