), as revealed by her husband, Travis Barker.

Its not like shes wearing the garment to the opera!

So really this is more like a peekaboo moment, less a fashion statement.

Kourtney Kardashian

Jeff Kravitz, Getty

Barker posted the snap in anInstagram roundupof cute moments in honor of his wifes 44th birthday on April 18.

Click through to slide 10 for the butt moment.

This content can also be viewed on the site itoriginatesfrom.

Although I guess hes left-handed, so…thats a piece of information thats in my brain forever now.

The caption was so sweet and sincere, as befitting a couple whomade a documentaryabouttheir wedding(s).

Im so grateful that today you were born.

You deserve everything your heart desires.

Nothing makes me happier than seeing you smile.

You stole my heart the moment we met.

Happy birthday to the most beautiful amazing woman to walk the face of the earth.

I love you my wife , he wrote.

Kardashianresponded, Im crying because you make me so happy.

I love you my husband.

Well, thats cute.