Kourtney Kardashian may be expecting her third child, but that did not stop her from leaping straight into summer.

The reality star released a picture on Instagram, where she can be seen in mid-air, jumping with four of her gal pals into her pool. In the picture the 35 year-old mother of two (Mason, age 4 and Penelope, 23 months) is wearing an itty-bitty silver strring bikini that shows off her baby bump. The caption for this action shot read, “#Sundayzzz.”

The oldest Kardashian and her friends appeared to be at her Calabasas, California, home where she had also hosted a birthday party for her niece, North West, the day before. As was only fitting for the daughter of Kim Kardashian and Kanye West, the “kidchella” themed celebration was quite the extravaganza. To mirror the Indio, California music festival Coachella, guests arrived to “kidchella” wearing their best bohemian chic (little North wore a floral headband and a fringe dress) and were met with face-painting, hair-braiding, a ferris wheel, and multiple stages set up for music and lip-syncing.

While the Kardashian clan was helping their newest family member blow out the candle on her tie-dye cake, Kourtney’s long-time boyfriend, and baby daddy, Scott Desick, was clear across the country in the Hamptons. Desick was seen that night at 1OAK in the south Hamptons, popping bottles of champagne and celebrating his own birthday. The self-proclaimed “lord” actually turned 31 back in May, but that did not stop him from having a second bash.

The couple’s relationship has been on-again and off-again since the Kardashians started their flagship reality program Keeping Up With the Kardashians in 2007. This included a break after their son’s birth, after which Desick sought out-treatment help for alcohol abuse.

The pair have announced that their third child is expected to arrive in December, 2014.