Even before looking in the mirror it was pretty apparent to Jeff that his choices had caused some change in both himself and his surroundings, for one he felt as if most things had somehow gotten larger around him and he felt like he could easily walk like a girl instead of his currently more subdued masculine walk. Another change he noticed was that more than just appearing larger, his wardrobe had gotten substantially larger with an extra closet, and the full-body mirror he was going for was next to another desk with numerous drawers and a large mirror. And when he saw himself properly, his suspicions showed themselves to be mostly correct, Jeff had indeed been altered after exchanging his mom with Hilda.
Where Jeff stood was someone who looked like Jeff if he had long and straight ass-length silver hair, dropped a bit over a foot in height from 6"2' to 5"0', lost basically all his fat and extra muscle mass for a slender effeminate figure (with his ass-fat remaining), lost essentially all his defining male characteristics (with one exception) to end up with a exceptionally androgynous figure, clean-shaven limbs and torso and a rather telling substantially larger bulge in his slim-fitting shorts. Which all combined to make Jeff into a 16-year-old boy capable of becoming a trap with a substantial snake in her pants, which wasn't in any way a bluff or exaggeration as Jeff could feel unbidden skill- memory and habit rise up and inform him where to find and use the perfect make-up for such an act, pre-stocked in his desk.
Blushing slightly as new memories of getting teased by his swapped mom and sister subtly arose as well, Jeff decided he wanted to try out being his "Female" "Alter-Ego" Jesse, and so walked over to his make-up desk on essentially Autopilot and began finding the make-up this new version of him used whenever he dressed up as the opposite gender (which judging by the memories he was slowly gaining on top of his old ones (not replacing), was essentially almost always, like school). And within moments of dusting his face, applying additional subtle layers with spots of extra where his face wasn't as soft as a fully female one, then applying contacts and grooming his hair a slight bit before tying it up into two spiral pigtails, Jeff saw the face of Jesse.
Next step was the rest of his body, one glance confirming an absence of hair everywhere there shouldn't be as Jeff disrobed completely, getting a closer look on his embarrassingly huge penis (indeed quite larger than it used to be) which was only flaccid due to extensive practice ensuring his dick only got erect when he wanted it to be or he was 'really' aroused (like seeing both his sister and mom naked in the bathroom). Then he went to his wardrobe and retrieved his school uniform (which had apparently changed into a variant of Japanese sailor uniform, specifically a female variant), starting with a modified pair of pink panties meant to accommodate his flaccid sausage, then a pair of B-cup pads went on below a bra and Jeff began putting on the actual clothes. Starting with a pair of thigh-high socks before putting on a white sailor fuku then a pleated black knee-length skirt, and so was he done.
"Oh gosh.~" A clearly effeminate voice breathed. In the mirror was the face of a 16-year-old girl with tastefully-applied make-up and pink eyes framed by long silver hair tied by twin yellow-baubles into long spiraling pigtails. Wearing a white sailor-uniform with a red tie, black skirt and white thigh-high socks she struck the figure of a subdued 16-year-old school-girl, with doubtful external relation with her Mother and older Sister considering just how small she was in comparison in every sense of the word, though with a secret hidden under her skirt few knew about. Jesse was at once amazed and embarrassed with herself at how easily she pulled off her by all accounts flawless transformation into her preferred form, while some part of the Jeff that swapped her Sister Stephanie and Mother Abigail with Sayaka and Hilda was... Underwhelmed.
Jesse, discounting the sizable penis packed into her panties which definitely qualified, was externally a slender school-girl with no immediately apparent trait that would make them stand out in an Eroge Visual Novel like 'Boobilicious Babes' except for her plainly normal proportions and not-normal-sized penis. Although, Jesse wasn't actually a character in the Visual Novel so maybe that'd be changed should she swap herself into the novel? Though that did make her wonder about what changes her prior Mother and Sister would have undergone should she swap them back again, maybe they'd still stay as Eroge-characters like Sayaka and Hilda? What then would them swapping back do to her too? Swapping Hilda with Abigail made her into a crossdressing femboy with rather large male genital, would swapping back Abigail make her more distinctly related with a normal hair-colour instead of silver, would she end up changing more or would nothing happen?
These thoughts and more considerations of things she could do crossed Jesse's mind as she walked over to the Chronivac on her now much fancier computer-setup with a subconscious female strut, sitting in the comfy chair prim and proper as she looked at her profile according to the omniscient Chronivac program.
Name: 'Jesse Briggs' (Female persona (standard)), 'Jeff Briggs' (Male persona)
Description: An Androgynous male with preference for female clothing and mannerisms despite a sizable penis, Little-brother/"sister" to Sayaka Briggs and son/"daughter" to Hilda Briggs.
Age: 16
Gender: Male
Genital size: 12-inches flaccid, 1-foot 6-inches erect
Height: 5"0'
Eyes: Grey-blue, prefers Pink contacts
Hair: Silver butt-length hair (tied in spiral pigtails), clean-shaven body
Occupation: High-school student, part-time Idol and Teenage-Model
Loves: Her older sister, mother and compliments
Dislikes: Showing her bulge to strangers and not wearing skirts in public
Kinks: Getting teased and Femdom
Jesse blushed at her listed Kinks, dick-size and loves, and nodded to the other details, guessing her part-time work as an Idol was the reason her computer looked a lot fancier including a large arm-mounted microphone like you typically see in use by professionals. And after looking through them, Jesse couldn't say she didn't feel curious how her schooldays go like this, or how the days go together with her Sister and Mother. Though on the other hand Jeff did feel like there were things he wanted to change now that she had the Chronivac before her, be it of more direct changes or swapping additional members of the VN with some of those she knew, both neighbors and maybe friends, with one though wondering if she could swap or place herself into the VN to see what changes occured, though instead maybe she could swap back her familymembers to see if their swap normalizes or they stay as their VN-altered selves.
Choices, choices.