Kourtney Kardashian got to spend some quality time with her youngest child Reign, 20 months, on Thursday, posting a picture of the duo out to lunch on Instagram.

"My heart," the 37-year-old simply captioned the super sweet photo.

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My heart.

A post shared by Kourtney Kardashian (@kourtneykardash) on

It's no secret that the reality star loves spending time with her three kids, often sharing pics with son Mason, 6, and daughter Penelope, 4, on social media as well.

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Kourt previously said her favorite part of being a mom is "watching your kids grow every day — watching all the little moments. I actually think my favorite part is that you relive your own childhood — going to Disneyland and watching all the movies I watched when I was a kid."

Scroll through the gallery below for more pictures of Kourtney and her amazing little family!