Pregnant Kendra Wilkinson showed off her big baby bump in yellow and pink bikinis while relaxing with her family in Santa Barbara, Calif., on Tuesday, April 15 -- see the pictures Credit: Splash News

Ready to pop! Pregnant Kendra Wilkinson showed off her big baby bump while catching a tan with her family in Santa Barbara, Calif., on Tuesday, April 15. The Kendra on Top reality star was all smiles as she proudly put her growing belly on display in two different bikinis. See more pics of Kendra here.

First, the former Playboy model, 28, donned a neon yellow two-piece that drew considerable attention to her baby bump. She went without makeup and kept her blonde locks in a low ponytail. The glowing star wasn't alone, however, as she was joined by husband Hank Baskett, 31, and the couple's 4-year-old son Hank Jr. while sitting poolside.

After a quick change-up into a pink bikini, Wilkinson then headed to the beach. She accessorized with a sarong as she watched her two gents build sand castles.

Us exclusively broke news back in October that the married couple of five years are expecting their second child. In December, Wilkinson's rep confirmed to Us that the pair are having a girl.

Wilkinson seemed in high spirits during her beach day, but admitted earlier this month that her second pregnancy has been tough. "I'm feeling like crap," she told Us at Jennifer Love Hewitt's Pea in the Pod maternity clothing launch party in Beverly Hills on April 1. "I've come to that point of pregnancy where I pretty much give up… I haven't been able to work out because I'm in so much pain. I'm just lying in bed in pain." 

"It's so brutal," she added. "She's crushing my pelvic bone. I can't even walk anymore."