Jenner uploaded a picture of a roll of film on Snapchat, with the trio of intimate pictures showing her planting a kiss on rapper Tyga’s cheek and the pair cuddling.
Tyga wasn’t the only person Jenner was cuddling up to at the birthday bash.
The reality star was also seen posing on her sister Kim Kardashian West’s Snapchat with her former love rival, Tyga’s ex Blac Chyna, who is now pregnant and engaged to Jenner's brother Rob Kardashian – proving they have well and truly put their differences aside.
Further confirming she is back on with Tyga, Jenner shared a picture of the pair’s hands intertwined as they sported matching diamond encrusted watches while car shopping together on June 28.
The pair were also seen walking hand-in-hand to her brother in-law Kayne West’s “Famous” premiere this week.
The couple called it quits in May, and although Jenner is yet to comment publicly on their relationship status, Tyga broke his silence on what went down in an interview with Big Boy TV.
"When you're in a very public relationship like that, it's hard for other people to see you differently than that," he said. "Being in that it took a lot, career wise, everything. It overshadowed a lot of my talents and a lot of things that I worked hard for."
He continued, "When something is so damaged or something is just not right, you can't fix it in a moment. The only thing is time," he continued. "Maybe later on in life, maybe we might come back."