Kourtney Kardashian's 'low-key' family dinner

While Kim Kardashian and boyfriend Kanye West have been flaunting their new romance all over town, Kim's older sis Kourtney had a tamer night out with beau Scott Disick and the couple's son, Mason.

The threesome ate dinner earlier this week at Meatpacking District hotspot Buddakan, but sources say it was a "low key family dinner."

Kourtney, who is pregnant with a baby girl, and her guys shared a variety of menu items, including edamame dumplings, a beef dish and tuna spring rolls.

Kourt was in town for E!'s upfronts presentation.

Follow Style/Entertainment Editor Julie Gordon on Twitter: @jbgordon