Nica’s Step-Mommy is getting ready to go out for the day, but first Step-Mommy has something to explain to her. She knows Nica gets lonely when she’s gone (and really needs someone to look after her), so now is the perfect time to introduce the newest addition to their household; a robot “maid” to keep Nica company and help tidy up after her. It seems quite unnecessary to Nica, but she also doesn’t really care much. However, things take a very unexpected turn for her when Step-Mommy Kat tells the robot to take good care of her “little one” as she walks out the door. The previously passive r...

Nica’s Step-Mommy is getting ready to go out for the day, but first Step-Mommy has something to explain to her. She knows Nica gets lonely when she’s gone (and really needs someone to look after her), so now is the perfect time to introduce the newest addition to their household; a robot “maid” to keep Nica company and help tidy up after her. It seems quite unnecessary to Nica, but she also doesn’t really care much. However, things take a very unexpected turn for her when Step-Mommy Kat tells the robot to take good care of her “little one” as she walks out the door. The previously passive robot registers the key phrase from her User, and utters the words, “Babysitter Mode activated”. The situation quickly unravels for Nica, as the robot immediately sets about caring for Nica as though she were a baby. Is this a terrible accident, or was this Step-Mommy’s plan all along?! The robot’s first order of business: checking Baby’s diaper. Finding Nica undiapered and inappropriately dressed, the robot begins its diapering subroutine, stripping Nica naked, laying out a changing pad and diaper right there on the living room couch, and gently but firmly making Nica sit down on it. Too stunned at first to get away, the robot is too big and strong for Nica to resist once it has its hands on her. A tug-of-war ensues over Nica’s panties, which she quickly loses along with the last vestige of her adulthood. The Nanny-Bot sweetly, but robotically patronizes Nica as though she were a real baby and stuffs a huge pacifier in her mouth when she fusses too much. Once the humiliating ordeal is over, instead of giving Nica back her clothes the Nanny-Bot adds another humiliation; nothing but a tight fitting, and very immature, Sailor Moon tank top for her to wear, which leaves her diaper totally exposed.

Nica has had more than enough of being treated like this way, and she starts asking the Nanny-Bot to call her Step-Mommy so she can come home and end this madness. Unfortunately for Nica, she’s unwittingly used another key phrase that triggers the Nanny-Bot to enter “Step-Mommy Mode”. The Nanny-Bot undoes its nursing bra, and begins calming its fussy “baby” by holding her close and softly murmuring to her as it mesmerizingly sways its breasts before Nica’s eyes, pulling Nica closer and closer until she finds her mouth sucking on the robot’s pink nipple. Nica tries to stop herself, but something about the robot’s voice, or maybe its huge breasts, is making it impossible for her to resist. There must be something in the Nanny-Bot’s milk, because without fully realizing it, Nica wets her diaper and becomes very docile, settling down for naptime in her new caregiver’s arms.

Kat comes home to find Nica peacefully cradled in the Nanny-Bot's arms. She's seen everything through the Robot's monitoring app on her phone, and she's so pleased with how Nica's been cared for and kept out of trouble while she was away. To Nica's complete shock, her Step-Mommy explains that instead of things going "back to normal" for Nica, the Nanny-Bot will be staying to take care of her this way from now on; and since Little Nica's diaper is already soaked, it's time for Step-Mommy and Nanny-Bot to give her a diaper change. Before she knows it, Nica is naked again, laid out on the couch between the Robot and her Step-Mommy having her diaper changed. Nica does not want to cooperate, but much to her frustration, Step-Mommy holds her hands out of the way as the Nanny-Bot wipes her pussy all clean and rubs lots of baby lotion all over it. As the Nanny-Bot continues methodically powdering and diapering Nica, Step-Mommy calms her down by breastfeeding her.

After her diaper change and some extra time being breastfed, Step-Mommy and Nanny-Bot dress Nica in a very babyish onesie, and Step-Mommy tells Nica that she wants her to learn to like being treated this way. Kat activates the Nanny-Bot's "Pleasure Mode", and leaves Nica in the care of her new robotic nursemaid. The Robot produces a colorfully decorated vibrating wand from its diaper bag, and informs Nica that "Baby needs a nap". The Nanny-Bot holds Nica's hands out of the way as it uses the wand to help her relax, giving Nica a very confusing orgasm in her diaper before pulling her into its lap for even more breastfeeding. Nica is going to learn that Nanny-Bot will take care of everything for her now.