Travis Scott's ASTROWORLD Tour has become a family affair. 

During his Madison Square Garden show Wednesday night, the rapper was briefly joined by Kylie Jenner—his longtime girlfriend and mother of his child. Now, we know some of you might be thinking: So what? Well, the cameo was especially notable because of the way Kylie rode onto the stage. Yes, rode.

The reality TV star/beauty mogul was seen riding on the ASTROWORLD roller coaster, a highlight of the show's set design. After footage of the stunt flooded social media, Kylie decided to share a behind-the-scenes video of last night's event, revealing everything that went down before her ride.

"I rode a roller coaster at Madison Square Garden!" Kylie screamed after stepping off the stage.

You can check out the full video above. There's also some pretty adorable footage of the couple's baby daughter Stormi.

The ASTROWORLD tour kicked off earlier this month in Baltimore and will make stops in Philly, Detroit, Chicago, and Phoenix before wrapping up Dec. 19 in Los Angeles. 

In related Scott news, Mötley Crüe founder Tommy Lee has threatened to sue the rapper for allegedly ripping off his set design. The rock musician posted a video of Scott on the ASTROWORLD roller coaster along with the caption: "Just found out this fucking idiot @travisscott or someone on his team ripped off the 360 and the Crüecifly! WTF!! Get an original idea bro."

Lee also shared a clip in which he is seen riding a similar roller coaster that was featured in his recent tour. 

Lee went on fire a warning at Travis via Twitter: "Hey @trvisXX lawyer up!"

The rapper's legal team has since dismissed Lee's threats:

"Tommy didn’t invent the concept of a roller coaster on stage and there's no legal basis for his accusatory outburst," La Flame's legal rep told Complex Thursday afternoon in an emailed statement. "The actual creator and owner of the system has granted Travis all rights to use that equipment to complement his original stage design."