I don't agree with what the mother is doing by trying to get restraining order against legal age boyfriend just to keep him away from her daughter, I feel that it should be only if her boyfriend is verbally abusive or physical abuse her then yes I would agree on the restraining order but using it against something else that is less harmful, even we know that it's against the law for kids dating someone above their ages and a restraining order is not going to help her daugther stay away from her boyfriend and sure isn't going to solved the situation either, her daughter could run away from him anyways with or without the restraining order....
I personally think the mother should find other ways to deal with the problem rather than trying to get a restraining order, she has to be in control of the situation and try as much punishment as she can in order for her daughter to listen, sometimes when a parent lets their emotional effect the situation then it can cause a child to run away from home, and that the last thing a parent would want to see that happen, so got to start thinking what would be the best solution to the problem that this mother is facing...I would find many ways as I can to deal with this situation but getting a restraining order might just make things alot worse to the point where the daughter would do almost anything to go against her own mother....
Tough love is one way to handle this situation and being in control by remaining calm when approaching or talking to a teenager child who not yet experiences what it like to be a parent herself, but we have to find ways to teach our children what right and what wrong, and maybe they will listen and understand the differences and know where her mother is coming from on this....