Two adventurous and lustful couples (Kasey Kei and Gal Ritchie, and Andylynn Payne and Vanessa Vega) get together to play a tumbling tower game. Andylynn soon makes a cheeky bet, insisting that whoever knocks down the tower first has to go down on someone in the other couple! They all eagerly agree to it and honor the bet, which eventually leads to Andylynn hiking up her dress and Gal giving her a hearty blowjob. But Kasey and Vanessa aren't going to be left out, so they hook up as well, leading to a side-by-side oral sex couple swap. But having just a taste of each other leaves them all SO HORNY that it eventually evolves into a full-sex couple swap followed by a free-for-all foursome!