Kourtney Kardashian and Scott Disick party in Las Vegas

Kourtney Kardashian and Scott Disick proved they are still together by partying in Las Vegas together.

The 31-year-old reality star joined her boyfriend to celebrate his 27th birthday.

The pair, who have a six-month-old son, Mason, reportedly checked into The Artisan Hotel before enjoying dinner with a group of pals.

Disick was reportedly presented with a birthday cake by the hotel’s owners before leaving to party at the Lounge club.

A source said to E! Online: “They were very affectionate with each other throughout the evening.”