Brandon Jenner compares his "baby bump" to wife Leah's in a funny Instagram photo. Credit: Courtesy of Leah Jenner/Instagram

Belly laughs at the Jenner house! Leah Jenner is clearly relishing her first pregnancy, and as the Keeping Up With the Kardashians costar, 32, progresses in her pregnancy, husband Brandon Jenner can't help but poke fun at her changing figure.

In a snapshot apparently taken in the couple's kitchen May 26, Brandon, 33, shows off the sympathy weight he's gained during his wife's pregnancy in the form of a fake baby bump. Leah's take? "He thinks he's funny," the mom-to-be wrote on Instagram.

Since announcing their happy pregnancy news on Instagram in March, the couple has kept fans of the singer/songwriter duo updated on their parenthood prep. "I can't wait to meet this little person. Already feel like a mama," Leah Instagrammed on Mother's Day. Pregnancy seems to be agreeing with the musician, whose dad is Eagles guitarist Don Felder. Frequently wearing skimpy bikinis and flowy maxi dresses to showcase her growing bump, Leah has said she "love[s] being pregnant."

Dad-to-be Brandon is also anxious about impending fatherhood. In addition to doting on his expectant wife, Bruce Jenner's oldest son with ex-wife Linda Thompson revealed on Instagram earlier this month that he's penning a special song for their son or daughter.

A photo posted by Leah Jenner (@leah_jenner) on Mar 15, 2015 at 2:28pm PDT

"I feel so fortunate to be able to spend my life with such an amazing soul. Our lives are intertwined in every aspect of life and I wouldn't have it any other way," Brandon has said of his wife of three years. "Anywhere [she is] feels like home to me."

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