Fasten your seatbelts, this flight will get frisky!

Two amorous passengers were apparently so desperate to join the Mile High Club, they did so in the comfort of their seats, in full view of a stunned couple who recorded their romp — and then sent it to their adult daughter.

“My mom and dad were just trying to have a peaceful trip to Mexico and then they sent me this,” Kiley Tully wrote along with a shocking clip she posted on Twitter.

The 45-second selfie video, which has received almost 3.6 million views, caught the couple in flagrante delicto as the woman straddles her partner at the back of the unidentified airliner.

The brunette, clad in a white outfit, is clearly seen thrusting up and down on the man two rows behind Tully’s parents, who look at each other in amazement at the in-flight entertainment.

At one point, the camera pans toward the front of the plane to show the rest of the passengers, who are apparently oblivious to the turbulence a few rows back.

Florida-based Silver Airways confirmed to The Post that the video was taken on one of its planes.

“We are taking this very seriously and working to determine the legitimacy of the video and specific flight information,” airline spokeswoman Misty Stoller said in a statement.

Twitter users did take note, however, with Izabela Olejnik writing: “Flight attendant: you guys need anything? Some snacks? A condom?”

“I guess they weren’t flying Virgin airlines huh??? I’ll show myself out,” @BamboozleIdiot quipped.

One user even suggested that Mexico’s upset win over Germany in the World Cup played a role in the action.

“Mexico victory brings out the best in humanity,” Joel Montes wrote.

Tully did not respond to requests for comment by The Post.