I think people who are advocating just letting her get in his car, without chatting to him or finding out how sensibly he drives have absolutely no idea the devastation a death caused by an idiot driver causes.
Re the above - you couldn't be MORE WRONG.
OP I have a lot of his with exh - he thinks I can control my eldests every move.
We used to - while together and apart - have huge rows about my "lax parenting" and how if anything happened to him "it would be my fault because I didn't care about him properly".
This could be about anything. Eldest is older teen now and exh has real issues accepting he isn't 5.
Eventually - I just gave up trying to get through to him make him understand eldest is growing up.
Now I just repeat - like a stuck record - "that's your opinion, I fundamentally disagree with you, you still think he is 5, if you want to try to police whatever ridiculous suggestion he is making that, go ahead and try but don't try to make me enforce something I don't agree with".
Over and over until it sinks home I'm not going to comply with him.
He doesn't mean any harm - but it's so easy for the to try to get us to do these things because it's means they can't dictate unenforceable rules with no consequences to themselves.
Also I would - and did - vocaly point out how disgusting I thought telling me if would be my fault if eldest had an accident was. Calmly, very coldly.
Eventually he said it one too many times (while still together) and I stopped speaking to him at all - froze him out and answers everything with "I'm not talking to you until you apologise".
It's an absolutely dreadful thing to say to someone and the ultimate in emotional blackmail.