The mom of four turned 45 on Thursday

Kourtney Kardashian. PHOTO: TRAVIS BARKER/INSTAGRAM

In honor of her 45th birthday, Barker, 48, posted sweet Instagram photos of some of their most memorable moments, including glimpses of their 5-month-old son Rocky Thirteen Barker.

“Happy Birthday to my beautiful wife, soulmate and best friend forever. I love you, I love our life together. Thank you for being the most amazing wife a person could ask for. Here’s to many more years of adventures together ❤️‍🔥” the Blink-182 drummer wrote in the caption of his post on Thursday, April 18.

The heartfelt tribute included a photo of the birthday girl smiling from ear to ear as she cuddled with their toddler in bed.

Kourtney Kardashian.TRAVIS BARKER/INSTAGRAM

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The following photo shows the proud parents kissing in front of an airplane. Rocky, wearing striped black pajamas matching his mom’s, was held in his father’s arms.

Kourtney Kardashian.TRAVIS BARKER/INSTAGRAM

The little one is the newest addition to the couple’s blended family.

The Lemme founder is a mother to daughter Penelope Scotland, 11, and sons Mason Dash, 14, and Reign Aston, 9, whom she shares with ex-Scott Disick.

Kardashian Barker is also a stepmom to Barker’s daughter Alabama Luella, 18, son Landon Asher, 20, and stepdaughter Atiana De La Hoya, 25, who he shares with his ex-wife Shanna Moakler.

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The Poosh founder previously opened up about her desire to expand their blended family in a May 2022 episode of The Kardashians.

“The more kids, the merrier. It’s more people to love. I am really close with Travis’ kids and I love them and it’s a beautiful thing,” she said during a confessional.

“Travis is a really amazing father. It’s one of the reasons that I fell in love with him. He is very, very patient. I think because we’ve all known each other, it does make it easier to blend our families,” she continued. “It’s all I could ever want.”

After baby Rocky’s arrival, Kardashian Barker explained how she changed her clothing choices to be able to spend more time with him.

“Getting dressed postpartum while breastfeeding=throwing on an oversized coat, flat shoes pretty much always, loves leggings, sweats, anything baggy and comfortable aka husband’s vintage t shirts and dickies,” the mom of four wrote next to an Instagram Story photo of herself in February.

“And anything super fast to throw on=less time away from my baby the better.. Makeup routine up next,” she continued.