Jeff knew he had at least 15 minutes while Jason showered, probably more while he examined and questioned his body... Jeff really wanted to dig in and mess with Jason, but how? He's already bigger, and a bit more hairy. Jeff was a little disappointed that Jason only noticed how hairy Jeff had become, not that he had grown bigger too. Although to be fair, he was preoccupied.
Maybe he could make Jason older and bigger still? That should make him question everything! Though Jeff wants it to be obvious but not deal with everyone else worrying about Jason. Here he recalled the perception/reality options and Jeff realized he didn't have to limit himself to plausible changes that could occur over a few months of Jason being at college.
Jeff set Jason up to age to 30 and gain 100 lbs. The real kicker is that his appetite would increase to support and grow his new weight to around 300lbs. Reality would change with him though Jason would only recall the original reality. "When he sees himself he will flip out!" Jeff snickered to himself. Thinking for a moment, "No, when he realizes his clothes fit and his ID shows he's 30 he'll loose his cool... No, wait... Mom and dad thinking he should be 30 will really send him over the edge..." Jeff thought through repressed giggles... Jeff was about to click submit but still heard the water going and knew he would be jealous of his brothers novel, if unexpected and unwanted, experience.
Quickly Jeff switched to his own profile and made similar edits to himself. He would age 9 years to 25, he would become around 200lbs, and his appetite would support 190lbs. He would recall both realities where everyone else would recall one or the other. Jeff was excited to see what adulthood had in store for him and to watch his brother try to cope with an unfamiliar reality.
Clicking submit Jeff noticed as everything seemed to warp and undulate as the fabric of reality submitted to the Chronivac, and through it, his will. Jeff blinked, he'd forgotten to change things over time so it defaulted to instantaneous... The ceiling creaked with the sudden change in weight it was supporting, Jeff paused, and there was a sudden yell of confounded horror coming in muffled tones from the bathroom above... Jeff couldn't help it, he laughed.
Jeff went upstairs and called into the bathroom asking if Jason was okay, Jeff could feel his body had grown dramatically in strength but like Jason, he could feel the excess fat his body now held. A completely new experience for him which he enjoyed trying. "You okay bro?" Asking the question was the weirdest part of the experience so far. Jeff hadn't considered his voice changing anymore, though it should have been an obvious conclusion, like his height increasing when going from 16 to 25.
Jason eventually came out of the bathroom looking freaked out and complaining until he laid eyes on Jeff. "Oh my God, Not you too!"
"Not me what?" Jeff asked, looking himself over. Jeff was in character and focusing on only thinking about the new reality. His brother looked normal and had struggled to keep his weight down since the end of college. He became a stress eater and had a weakness for snacking. "You look bothered by something, are you okay?"
Jason just stared at Jeff, Jeff could see Jason was processing that his response meant the way things are are normal to Jeff, and eventually muttered that he wanted to go to his room. Jeff recalled it was now a guest room with some of Jason's old things, no longer the bedroom of a teen who had just left for college. Jeff stayed on the stairs listening as Jason entered his (former) room, his shocked gasp made Jeff race down the stairs snickering so as not to be caught.