Scott Disicktook a moment to wish his exKourtney Kardashiana happy birthday over the weekend.In honor of her 42nd birthday on Sunday, Disick posted a photo with the star and their three children:Mason, 11,Penelope, 8, andReign, 6. “Happy Birthday 2 the best mom a child could ask for and more!” he captioned the photo on his Instagram Story.Kardashian and Disick, 37, called it quits in 2015 after nearly a decade together. They’re both currently dating other people: Disick has been withAmelia Gray Hamlin, 19, since last fall, and Kardashian’s relationship with boyfriendTravis Barker, 45, has been getting increasinglymore serious. (PEOPLE confirmed in January that the longtime friends hadstarted dating.)scott disick/ instagramBarker celebrated Kardashian’s birthday with his own post, sharing a PDA-filled slideshow of the couple, including a snap of the pair kissing and a video of Kardashian sucking on his thumb.“I F—ING LOVE YOU! YOU’RE A BLESSING TO THIS WORLD,” the musician, who shares stepdaughter Atiana, 21, daughter Alabama, 15, and son Landon, 17, with ex-wifeShanna Moakler, captioned his post. “HAPPY BIRTHDAY @kourtneykardash.“Never miss a story — sign up forPEOPLE’s free daily newsletterto stay up-to-date on the best of what PEOPLE has to offer, from juicy celebrity news to compelling human interest stories.A source told PEOPLE last month that the Poosh creator had reached a place in her life “where she’sready for a relationship with a more mature guy.““Kourtney and Travis have a long, long history and years of friendship,” the source said. “They’ve felt like family for years and she’s really close with Alabama, who’s just a cool rock star kid.“Disick, for his part, ended his long-term relationship withSofia Richie, 22, last summer andwent publicwith Hamlin in October. During an episode ofKeeping Up with the Kardashiansthat aired last month, he opened up aboutthe ultimatum he said Richie gave himbefore their official split.“I thought I would give it a try and make her more of a priority, but then even when doing that, I feel like she just started wanting to push Kourtney out,” he toldKim Kardashian WestandKhloé Kardashianon the show. “And I said, like, that’s the most important thing to me — my kids and that’s my family, and the only family I have, including you guys along with it.““She was like, ‘I don’t want to share you as a boyfriend with Kourtney,'” he continued. “And then she literally said with an ultimatum: ‘You have to choose me or Kourtney.'”

Scott Disicktook a moment to wish his exKourtney Kardashiana happy birthday over the weekend.

In honor of her 42nd birthday on Sunday, Disick posted a photo with the star and their three children:Mason, 11,Penelope, 8, andReign, 6. “Happy Birthday 2 the best mom a child could ask for and more!” he captioned the photo on his Instagram Story.

Kardashian and Disick, 37, called it quits in 2015 after nearly a decade together. They’re both currently dating other people: Disick has been withAmelia Gray Hamlin, 19, since last fall, and Kardashian’s relationship with boyfriendTravis Barker, 45, has been getting increasinglymore serious. (PEOPLE confirmed in January that the longtime friends hadstarted dating.)

scott disick/ instagram

scott disick and family

Barker celebrated Kardashian’s birthday with his own post, sharing a PDA-filled slideshow of the couple, including a snap of the pair kissing and a video of Kardashian sucking on his thumb.

“I F—ING LOVE YOU! YOU’RE A BLESSING TO THIS WORLD,” the musician, who shares stepdaughter Atiana, 21, daughter Alabama, 15, and son Landon, 17, with ex-wifeShanna Moakler, captioned his post. “HAPPY BIRTHDAY @kourtneykardash.”

Never miss a story — sign up forPEOPLE’s free daily newsletterto stay up-to-date on the best of what PEOPLE has to offer, from juicy celebrity news to compelling human interest stories.

A source told PEOPLE last month that the Poosh creator had reached a place in her life “where she’sready for a relationship with a more mature guy.”

“Kourtney and Travis have a long, long history and years of friendship,” the source said. “They’ve felt like family for years and she’s really close with Alabama, who’s just a cool rock star kid.”

Disick, for his part, ended his long-term relationship withSofia Richie, 22, last summer andwent publicwith Hamlin in October. During an episode ofKeeping Up with the Kardashiansthat aired last month, he opened up aboutthe ultimatum he said Richie gave himbefore their official split.

“I thought I would give it a try and make her more of a priority, but then even when doing that, I feel like she just started wanting to push Kourtney out,” he toldKim Kardashian WestandKhloé Kardashianon the show. “And I said, like, that’s the most important thing to me — my kids and that’s my family, and the only family I have, including you guys along with it.”

“She was like, ‘I don’t want to share you as a boyfriend with Kourtney,'” he continued. “And then she literally said with an ultimatum: ‘You have to choose me or Kourtney.'”

source: people.com