In the short clip -- posted to both Jenner's and Tyga's Instagram accounts -- the two walk hand in hand into a party DJ'ed by Skrillex.
Things get a little racy a few seconds in, as Tyga pins his ladylove up against a wall, kissing her on the neck. They later retreat to the bathroom, where the rapper watches Jenner dance with model Anna Ewers, while he lounges in a bathtub.
While Jenner and Tyga flaunt their PDA, things aren't all rainbows and butterflies for Rob Kardashian.
The 29-year-old reality star lashed out at Jenner on Monday night, tweeting out her phone number, and calling out the rest of his family for not inviting his pregnant fiancée, Blac Chyna, to a baby shower.
"Rob was told that the shower was still going on for him but Chyna couldn't make it, but he misunderstood the entire thing and overreacted," a source tells ET. "The girls knew Chyna couldn't make it, and Chyna was cool with it, but Rob thought something was being done behind closed doors to make sure she couldn't be there."
According to the source, Kardashian is still convinced that his family doesn't like Chyna, and harbors insecurities about Jenner's current relationship with Chyna's ex, Tyga. "The entire situation is so bizarre, and Rob has always been insecure about that," the source says.