Gianna Dior and Alex Mack, a happily-married couple, struggle to fix their car. Alex isn't mechanically inclined, and Gianna's losing patience. When she calls an irresistible mobile mechanic - Bella Rolland, she diagnoses the problem quickly. Smitten with the alluring stranger, Gianna explores some raunchy positions around and under the car while Alex nurtures his wounded pride inside. Bella keeps Gianna's pussy wet with a secret strap-on until Gianna accidentally soaks her tits in motor oil, and Alex returns. With his wife inside showering, Alex takes his run at the alluring mobile mechanic, pounding her wet pussy til she soaks the windshield. Bella runs inside to join Gianna in the shower, and Alex follows along, turning a routine car repair into a sneaky, slippery shower threesome.