Jay had been browsing the net for the past couple of months, looking for some sort of inspiration to make the prank on Sean better. After browsing a hentai website, Jay discovered something new: girls laying eggs.
While Jay thought it was pretty weird himself, he thought it might be funny watching Sean react to this "new" change. So, Jay searched the features and menus of the Chronivac, and managed to find a selection for "oviposition." (Egg laying.)
Jay figured he'd make the eggs roughly chicken-sized (he didn't want to hurt Sean,) and fairly hard-shelled (so they wouldn't break as they were being laid.) Jay decided that Sean would lay eggs regularly, about one to four every seven days or so. And, just to make things easier on Sean (and to avoid an extra mouth to feed,) Jay changed the fetus into an unfertilized (if large) clutch, ready to be laid in a day or two. Finally, Jay selected the "perception of reality" feature, to make sure Sean (and most everybody else) think this was all normal.
Satisfied with his work, Jay clicked "save" twice, and sat back to enjoy the "fruits" of his labor.