Keeping Up With the Kardashians star Kourtney Kardashian stepped out with son Mason, nearly 7, on Tuesday (November 29).

While heading into art class in Woodland Hills, Calif., Mason tucked his arms inside his T-shirt.

According to E! News, the reality star, 37, and her on-again-off-again beau Scott Disick are on-again.

After a year-and-a-half apart, the famous exes, “are back together and giving their relationship a try again,” according to a source.

The insider adds, “Scott’s mellowed out a lot and hasn’t been partying.”

The parents of three — including 4-year-old daughter Penelope and nearly 2-year-old son Reign —  “both want to make it work for them and their kids,” says the source.

And while they’re not living together, they’ve been back on for a few months.

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