Khloe Kardashian and boyfriend French Montana went on a double date with sister Kourtney Kardashian and longtime love Scott Disick in the Hamptons on Thursday, June 12 Credit: AKM-GSI

Dining duos! Khloe Kardashian and boyfriend French Montana went on a cute double date with Kourtney Kardashian and longtime love Scott Disick in the Hamptons on Thursday, June 12. The foursome were photographed grabbing a bite to eat for lunch at Pierre's during the afternoon outing.

Khloe, 29, and pregnant Kourtney, 35, are currently in Southhampton filming the latest Keeping Up With the Kardashians spin-off, Kourtney & Khloe Take the Hamptons. Kourtney seems to have no problems hanging out with her sister's new beau, but other members of the Kardashian-Jenner family are wary of the relationship, a source tells Us.

"[They] are very skeptical of him," an insider exclusively reveals in the new issue of Us Weekly. "They think he's using Khloe for fame."

"Being with Khloe means everyone knows who French is now," a second source added, "so he's getting a lot out of it."

Kourtney and Scott, meanwhile, have baby on the brain—again. As Us exclusively revealed, the parents to son Mason, 4, and daughter Penelope, 23 months, are expecting their third child in December.

"It was planned. [Kourtney] wants to have a handful of kids," an insider told Us. Added another: "They don't know the gender yet. They just want the baby to be healthy."

During the double date, Kourtney sweetly held onto Disick's hand while leading the way with Khloe and French close behind. She wore tight-fitted jeans and concealed her growing belly with a black-and-white plaid button down.