Okay. Roll were kind f everywhere. In the future I will be sticking to your roll counts for what you link to but since oamx8o1V did do a second properly formatted single roll I will count that one for Jenn's spell roll.
We have:
>>6330139>>6330152>>6330748 For training.
Best: 96 Physical, 63 magic training
For Jenn's spell:
>>6330151>>6330730>>6330751Best: 80
I am assuming you want to use a level 1 Jenny boost to bring it to a 90, leaving Aubrey completely unscathed and pass 3/4 DCs to get a moderate Charms boost, a small Battle boost, a minor trait, and small bonuses for your twin and a Major trait for you.
You don't know how many times a day it can be used other than more than once and may have slight, mostly temp side effects. No maluses or such. More narrative than anything.
There is no obvious tell and basically no lingering downsides at the lowest level other than only being able to use it a certain number of times a day.
I will wait a little bit to see if multiple people say "no" or want to use the 1 time a day Level 2 boost to reroll and get a +15 vs a +10 to try for 4/4.