Sally was wondering how high she could crank up the age transfer, seemed like the answer was 0 without anyone selected. However when she linked herself it seemed like she could give away or take 8 years to/from herself that was probably a safety feature, but if she targeted someone else could they give away more than 8 years to her?
"Watcha doin?" Henriette asked as Sally yelped a bit as she fat thumbed the controls. The younger girl had been too engrossed and felt like her getting caught fiddling with the ChronoSwap was going to get her into a lot more trouble as the device made a high pitched beeping noise and a cooling fan started to spin. A cold sweat went down both sister's backs as Henriette asked "What did you do?"
Sally looked down and said "I'm taking 8 years away from you, sorry." 30 seconds was a long time in a case like this, but also short as Sally could feel her clothing getting relatively smaller on her form and as she became 11 at the 10 second mark roughly. Henry entered the living room after hearing the beep around then and saw his sister's switching. No more like equalizing ages as Henriette was slimming down a bit as her adult growth was shrinking and Sally was trying to cover her chest as her breasts were starting to come in.
"The heck!?!" Henry yelled which brought their parents in quick and they saw that their daughters were growing and shrinking in roughly equal amounts. The Mom pulled her son and husband away as she got a towel for her youngest daughter.
When things cooled down, Henriette was able to make her loose clothing a little tighter, and Sally was able to borrow some clothes that were... less loose on her there was a family meeting as the parents and the three nearly twins sat at the dinner table again.
"So Henry," their father said "When do we need to give back the ChronoSwap?"
"It didn't say specifically, but even if they want it immediately if we explain the situation they'll probably give us the two days."
Sally raised her hand and said "I could probably get it working again soon."
Their father arc'd an eyebrow and asked "How?"
Sally said "It's just a little bit of code, and I saw a port to connect it to a computer. If it's about cooling down I could use that thermal camera I asked for last christmas and we could apply some cooling to any part that's overheating."
"Sounds like it could work." their father said
"But we can't put ice on an electronic right?" Their mother asked
"Could just use a fan, or put it in the fridge for a bit." Sally responded
With the problem having a solution Sally went to town looking into the code and just finding the bit talking about a cooldown timer and change it to... 1 minute instead of 48 hours. She didn't want to make the cooldown 0 and accidentally having it rapid fire or something. She had been left alone while doing it, and she pulled her v-neck shirt down a bit and looked at her cleavage and squished her boobs together a bit just seeing how they worked first hand. She felt sexy, and kinda wanted to pose a bit but... now wasn't the time. Using the camera she took a look at the ChronoSwap and it was... room temperature. She actually remembered holding it and it wasn't too warm either. She went downstairs as her brother and sister were having a semantical argument over who would be older Harry or Sally considering Sally was born earlier in the year than Harry, but Harry had still existed longer than Sally.
Sally said "Excuse me, but the ChronoSwap should work now. It's not even hot or warm, just slightly above room temperature."
Harry sighed in relief "So should I give my age to Henriette then? and if it goes well we give some of Sally's age to dad?"
Their Mom said "No, feel free to give your age back to Henriette but Sally was being naughty and she'll get to explain to her friends why she can't go over to play."
Sally handed the ChronoSwap to Harry who first targeted himself, then Henriette, and then set the age to send 8 years to Henriette. Were there any errors though?