Complaining - requirements - bribes - I dunno
Jen It hides fine but I won't survive 4 days of partying in it
If concealing is not something that concerns you, that is fine, but it is still a fairly reasonable complaint to have. So maybe still make it part of your negotiation, but a part you can relent on.
If there is one thing to gather from the experiences you have shared, it is that your mother is over-eager, but can be reasoned into something you can consent to. So if you start with only wanting to wear it after sundown, and you negotiate her down to a single mid-event hygiene break, you can solve your most pressing problem while still making her feel like she won.
Jen I've never done 4 days. And never swimming at the beach
Your concerns are understandable, but I would consider agreeing. it seems like having your own car is a really small compromise compared to that. I agree though, this should have been discussed much earlier, ideally before you booked.
is it important to define the deal exactly, is it really 4 days to wear the belt there and then get the car? can you also enjoy the trip with a belt? how much does the belt affect the experience? make a list of advantages and disadvantages and talk to your parents again so that they don't have any evil ulterior motives and don't put you under constant pressure with the car
curious If you were offered a car or another similar bribe appealing to your own preferences, would you in return agree to complete chastity (belt, thigh bands and bra) until marriage or studies finished (whichever comes later)?
a very general question, I think it depends on what I'm being offered. I wouldn't want it for a small used car, at least until marriage (unless I have a partner I want to marry anyway). a porsche and a villa make the situation look different 
Angelina a porsche and a villa make the situation look different
Puh, you are really greedy. LOL
I picked the car as an example, because a car (no matter how old or shabby) provides a degree of freedom and independence in other areas of life, while being in the chastity gear takes away another part of personal freedom.
So a trade-off between two different kinds of freedom.
And getting back to your own situation. What about if you had been offered a car at age 16 (assuming driving at that age was legal in Germany like it is in the US or Australia)? Would it have been more tempting then compared to what it is now?
Getting a car for wearing a belt for a few days sounds like a pretty good deal to me.
Amira
I don't think that this is what Jen needs to worry about.
If they really wanted to have her belted 24/7, they simply could have refused to open the belt one morning and told her "get used to it".
And put yourself into the position of her parents. They have probably other priorities in their life than thinking about what after exam party Jen has planned. Now that party is getting closer and with the old car becoming available now, the question what to do with it came up. It might be on short notice for Jen, but from her partents perspective it was most likely just what came up naturally at this time.
And I don't think it is unfair from her parents to make that offer.
If Jen rejects the car, nothing in her life has changed. She can party just the way she has planned. So why is that unfair then?
Of course parents are worried that in such a situation self-control over the key will not be good enough for the same reasons that I have doubted that in general this self-control will work until marriage. Both her parents and I might be wrong, but I bet they have their own life experience and based on that they want her belted more strictly at least during such high-risk events and then they just came up with the idea of offering her the car in return for accepting that additional control.
curious If they really wanted to have her belted 24/7, they simply could have refused to open the belt one morning and told her "get used to it".
Yes and destroying any trust Jen ever had in them and as well any good relationship. That would have been a not smart move.
- Edited
only because Jen has said that this is not negotiable for her, it is not unfair of her parents to try to change her mind.
As I said, she can reject the offer and everything is exactly as if that offer was never made.
Jonas In terms of keeping clean or in terms of physical discomfort while dancing etc?
No I can keep clean. It's the physical - it's a long time and yeah activities too.
Jonas It would be a whole lot easier if you could be open with your mates about it. Are you going with the friends who already know you wear?
Yes the girls I'm sharing with know but most of the group (in other rooms) don't know
Ines They say it, but it works and for sure you can use it a bit loose.
They had it in few days.
I think I should get one. To late for tomorrow though.
Hi, we've agreed - I need to take the belt tomorrow but not wear it till 10pm and we will video call so they can see I'm not drunk. If I want to drink the belt gets locked first. So that's Saturday night. Mum's going to drive down Monday morning to unlock me. Then I'm free Monday and same rules Monday night. Then I'm belted till I come home Wednesday.
So I that will work. But the car's not actually gonna be mine, I just get to use it. But I need to keep using the belt like I have been and keep committed to chastity and no exceptions or excuses. So yeah there's that.
I was writing while you postedYikes my friends - they think I have the keys. They're gone freak