Nubile Cadence Lux is frustrated by her science experiment. She sticks two electrodes to her forehead to record her biofeedback, and inputs different values into the program she designed on her computer, attempting to signal the body to sense a range of emotional responses such as anger, fear and hunger. But her experiment is not producing results, until she drops the pads onto her lap. She retries the experiment on her pelvis and is impressed by the intensity of the electrical impulses surging thru the pads, and causing her to orgasm uncontrollably.

What Cadence doesn't realize is that her stepmother Mona Wales heard her bellowing and came upstairs to watch. When Cadence washes up in the bathroom, Mona sneaks into Cadence's room to try on the electrodes, and she experiences the most powerful orgasm of her life.

Cadence comes out the douche in a towel and Mona shamelessly asks her to display her how the device works. Cadence is embarrassed that her stepmother found her science project, and she is even more ashamed when Mona wants to see her try it on herself. Mona takes the lead and applies the electrodes to either side of Cadence's pussy, and Cadence begins to writhe from the current coursing thru her sensitive pussy. Mona wants to see if Cadence will react to extra stimulation, so she licks her clit at the same time. Mona is nosey to know how many times the device can make her stepdaughter cum.

Cadence is paralyzed with pleasure while her stepmother rubs and licks her pussy. When Mona requests a turn, Cadence reasons that it would be helpful to test her experiment on a specimen other than herself. She applies the pads to Mona's pussy and fingers her wet pussy until she squirts on the bed.

Having crossed the lines of propriety already, mischievous Cadence sits on Mona's face and lets the MILF eat her pussy and make her cum. Then the perfect teenager reciprocates the pleasuring by rimming Mona's asshole with her skillful tongue. The lesbos try on the electrodes while tribbing and experience orgasmic results once again!