December 24, 2014 04:00 PM

Forget Mommy kissing Santa Claus — the Lacheys are smooching each other!

Expectant mom Vanessa Lachey posted the picture she used for the family’s holiday card to Instagram on Tuesday, and it couldn’t be cuter.

In the sweet snapshot, Nick Lachey holds son Camden, 2, on his shoulders as he puckers up for his wife’s baby bump.


“This photo was taken on Camden’s birthday and it’s my favorite picture of all four of us … at least, so far!” she wrote on her website.

The stars are expecting their second child, a girl, just after the holidays.

And Camden couldn’t be more excited to become a big brother.

“I don’t know if he completely grasps the concept of a little sister, but he’ll kiss her belly and say goodnight to [his] little sister,” Nick Lachey told PEOPLE last week.

— Michele Corriston

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