Credit: Instagram Photo: Holly Madison Shared This Family Photo With 9-Month-Old Rainbow on December 24, 2013.

Holly Madison just turned 34 on December 23 — and maybe by the time 35 rolls around the former Girl Next Door will be on her way to Mom of Two.

Holly and Pasquale Rotella, whom she married back in September, are parents to 9-month-old Rainbow Aurora.

While celebrating her birthday in Las Vegas, Holly told Us Weekly they have plans to expand the family.

"We definitely want more kids sometime soon," Holly told the magazine. "Most of next year I'm going to be concentrating on working and stuff, by hopefully by the end of next year."

Not sure what that work and stuff entails, but part of her work has to be raising Rainbow, who is now crawling, has five teeth, and is "cuter than ever," Mom reports. Holly shared the photo compilation shown on December 24, writing, “#FamilyDay #perfect #birthday @pasqualerotella #RainbowAuroraRotella.”

Back in May, Holly told On the Air With Ryan Seacrest that she wanted to have a second baby by the time Rainbow was 2. "So, next year we are going to start trying again," she said. "I want to have a big family. My boyfriend and I are aiming for like six…so, we’ll see how it goes."

That b-friend is now her hubby and they better get crackin' if they want to get to six.

Anyway, happy 34th birthday to Holly — and good luck with the baby-making!

Sources: Us Weekly, Instagram