By Kelsey Glein
Updated Apr 19, 2016 @ 10:45 am
Scott Disick and Kourtney Kardashian - at 1 OAK Nightclub - February 21, 2015
Credit: David Becker/WireImage

Kourtney Kardashian's family members weren't the only ones to wish her a happy 37th birthday yesterday. The Keeping Up with the Kardashians star's estranged love Scott Disick took to Instagram to wish Kourtney well on her special day, and the throwback photo he posted to commemorate the occasion was super steamy.

"Happy birthday @kourtneykardash everyone who knows you loves you so much!" Disick captioned a 'gram of the pair kissing in the ocean, which had fans buzzing over whether or not the duo had rekindled their rocky romance.

But according to Kardashian, the pair are just pals. Last week the mother of three appeared on the Today show, where she discussed their relationship. "We're not getting back together right now, but I don't know what the future holds in life, in God's plan," she told co-anchors Hoda Kotb and Kathie Lee Gifford. "But we're just doing our best to be the best parents. Like, he came with us to Vail and it was great. But, like, we're friends at this point."