- Edited
I've been thinking again about this, and looking again at what Laura said:
Laura She can ask to be unlocked anytime instead
Though the belt was presented in a very negative and stressful way, I don't think these parents would go against their previous agreement to remove the belt whenever asked (during a trial period), and anyway, Jen has already won the battle to make her own choice as to whether to wear the belt in the long term. So the initial submission here isn't a huge one.
I still think the 3 day trial isn't sensible - better to take things much more slowly, a couple of hours a day with regular unlockings, to check fit and soreness, but also build trust and confidence. I think her parents would be happy for her to try it at this point and would work to ensure that things went smoothly. But who knows eh? We have too little information to do anything more than speculate. I just hope it all works out well for all concerned.