The former couple and their kids did lunch Tuesday at CRU in Nantucket, where eyewitnesses tell us they were ushered to a private room in the back of the restaurant with a nanny in tow.
TMZ reports that ,Kourtney appeared to be in good spirits, even taking a selfie with a fan. Scott, on the other hand, was more reserved.
Family sources say they're on a family vacay, and Scott and Kourt have been on good terms.
This appears to be the first time Kourtney's linked up with her baby daddy since may.