Kylie Jenner got cuddly with her boyfriend, Tyga, while flying to Las Vegas on a private jet for a "last-minute" adventure on Saturday, August 27.

The 19-year-old reality star shared a PDA-tastic Instagram snap while flying the friendly skies. The image shows Kylie, who's wearing a grey sweatsuit, snuggled up on her Ice Cream Man.

Of course, we couldn't help but notice that along with a pair of Converse, she's still got on the bling that Tyga supposedly gave her on her ring finger. Ever since the on-again/off-again couple got back together, rumors have been swirling about the twosome's possible engagement. In July, Kylie started showing off what appears to be an engagement ring, consisting of one huge oval diamond surrounded by tiny diamonds, on her ring finger.

Despite appearances, E! News has reported that the couple is not engaged. A source told the site, that while they aren't betrothed that, "Kylie has brought up marriage with Tyga to her friends lately, both jokingly and seriously."

Not a lot of people wear huge diamond rings on their ring fingers who aren't engaged -- but a lot of people aren't the Kardashians!

In addition to the kissy photos from Saturday, Ky, who recently celebrated her 19th birthday, had shared an Instagram on Friday night of three high-priced bags with the caption, "last minute adventures." Looks like that that adventure entailed an unscheduled trip to Vegas!

last minute adventures

A post shared by Kylie (@kyliejenner) on

These two were clearly smitten kittens -- but they actually weren't alone on their flight. The duo brought along the 26-year-old rapper's young son, King Cairo, to Sin City. The trio headed there for Tyga's appearance at a Vegas nightclub.

In addition to engagement talk, there are plenty of other rumors surrounding Kylie -- this week she did her best to shut down speculation that she'd had breast implants after sharing some rather buxom images of herself on both Instagram and Snapchat. Kylie took to Twitter to refute the gossip, tweeting, "TMI but it's that time of the month lol. They will deflate soon. And it will be a sad sad day."

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Definitely TMI … but Kylie wouldn't be a Kardashian if she didn't tell the world too much!