It is thought the kiss happened before the 30-year-old socialite knew she was pregnant, but the steamy moment is bound to raise a few eyebrows now with just four months to go until her baby is born.
Getting close: Kourtney Kardashian kisses a friend named Jackie, who she met in her art class in Florida
Steamy: The girls cuddled up in the corner of a Miami nightclub
Kourtney kissed pretty bisexual Jackie in a Florida nightclub after meeting her in an art class and deciding to accept her affections after a few too many drinks.
The whole encounter was caught on camera for her reality show with her younger sister, Kourtney and Khloe Take Miami.
Cameras continued to roll as the pair cuddled up together in the corner of a lesbian club.
Reality star Kourtney and Jackie get closer in the lesbian club
Kourtney said she regretted the kiss the following morning.
She said: 'I'm so embarrassed, I can never talk to this girl again.
'Jackie is calling me non-stop and I'm so embarrassed I made out with her.
'I did not mean to lead her on.'
Back together: Kourtney and boyfriend Scott Disack, the father of her unborn baby, shopping in Malibu, California yesterday
Kourtney, who is the eldest of the Kardashian sisters, has reunited with on-off boyfriend entrepreneur Scott Disick, 25, after discovering she was pregnant with his child.
The couple were spotted out together at the weekend. They went shopping in Malibu and then bought frozen yoghurt, which they fed to each other.
She wore a cream and brown striped dress over denim hotpants and flat sandals, which hid her baby bump.
They had split in February, and much of the reality show centres around Kourtney rediscovering being single - and bumping into Scott along the way.
The reality show also charts the opening of the sisters new D-A-S-H boutique in Miami, Florida. They already own a store in California with socialite sister Kim
The couple share a snow cone in a Californian restaurant