Started with Kirsty

In truth, the cloaking operation was an extraneous precaution, as there was little that could distract the pair from each other. Kirsty sat cowgirl style on her boyfriend's pole, with her back turned to the door and giving James an eyeful of her slender form and bobbing breasts. Still, Unit Kate crept in and crouched at the foot of the bed. She would take the young lady first.

A green gas filled the room as Unit Kate employed the classic opening to the Penetrator conversion program. Already consumed with the hot and sweaty pleasure of sex, the couple never noticed the sudden and strange thickness of the air. They gasped and breathed deeply in all that the penetrator had to offer, their arousal increasing ten-fold as the compound came into their lungs. When Unit Kate saw the girl Kirsty moving up and down her son's cock faster than any normal human would do, she knew that it was time to begin the next step in the conversion program. Folding her fingers until a solitary digit remained, Unit Kate activated the Penetrator probe and wiggled her hand between the nether regions of the two lovers.

"Oh....?" Kirsty moaned in a surprised tone. She was puzzled at what seemed to be -another- penis or otherwise a long, phallic object inserted into her ass. The girl had, in fact, put the Penetrator probe into herself, Unit Kate having only placed the advanced tool an inch down from its fleshy, human counterpart. But it seemed that the girl didn't much care for explanations, the arousing cloud still enveloping her body and her mind. She continued to ride her boyfriend's cock-- as well as Unit Kate's Penetrator Probe-- as hard as she had before.

Half of Unit Kate's work had been done for her, seeing as the two targets must have been going at it already for some time. Even now-- unbeknownst to either of them-- Kirsty was quite readily assisting in her own conversion into a Penetrator unit. This meant considerable savings in battery expenditure, which would be important for all when it came time to step up the overall mission of enslaving humankind.

"Oh god, yes!" The woman cried endlessly at the pleasure of her double-penetration. At this moment, Unit Kate was ready to enter the final phase, and released the nanobot fleet into the girl's body. But this particular step in the operation would have to be different from others. It was still too early to complete the transformation, since James would see his girlfriend slowly turning into a robot-- no, that wouldn't do. Instead, Unit Kate targeted the tiny fleet directly to the target's brain, where she could gain control over the human without overtly altering her appearance. Once both were under Penetrator control, she could finish the conversion.

Kirsty twitched visibly as the microscopic machines traveled through her body, following her spinal cord up until they reached her cranial cavity. She abruptly halted her motions and spasmed violently while the nanobots did their work, taking control of key synapses and building a microprocessor core between her hemispheres. James developed some worry at his girlfriend's odd behavior, but was quickly relieved as the robots completed their task and restored regular functions. Kirsty closed her eyes, opened her mouth, and rode like there was no tomorrow.

Unit Kate retracted the penetrator probe and sent a signal to Kirsty's newly installed onboard computer.