Is Christmas coming early for Kristin Cavallari and husband Jay Cutler?!

The former star of The Hills sparked speculation that she’s pregnant with a fourth child after posting an Instagram pic — which she captioned “twinning.” In the pic, the slim star is wearing an oversized sweater, which many think frames her potential baby bump.

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Twinning

A post shared by Kristin Cavallari (@kristincavallari) on

“You think she’s preggers,” one commenter asked another. With another playing it more straight, simply writing, “Baby bump.”

Kristin has three kids, Camden, 4, Jaxon, 2, and Saylor, 1.