How to be a referee between my parents and my sister?

Ok heres the thing my older sister who is 17 has a boyfriend who is 24. she is going to be 18 this march.But my parents are gettinng to the point that they say she doesn't matter and they hate her and want to kick her out. I am right in the middle of it to. I have to be on both sides...And it makes me feel bad for my older sister that my parents say things like that but then I feel bad for my mom and to seeing how she doesn't come home till 4 in the moring and doesn't pair her phone bill or car bill. She really doesn't listen any more. I just don't know what to do.

Hi,

Well, maybe you can act as a mediator for them. Have your sister and your parents sit with you in a comfortable room- like the living room. Have a special "Talking" object-only the person holding the object can talk (to avoid arguing on top of each other). You start off- address your sister first, tell her that maybe she should come home earlier, etc. etc. Then tell your parents how they could better communicate with your sister...

Dear kiwe_0809,
The smart thing to do is stay out of it. You are not the parent here and your sister is old enough to make her own choices. If your parents are allowing your sister to ring up a phone bill they need to cut off the phone. She has a car bill...let her loose the car. They are not helping her see the consequences of her actions. Your sister is old enough to know better and if she chooses not to obey the rules at home she needs to move out. Getting involved either way will not benefit either of them or you at this point. Both your parents and your sister are not following through on their responsibilites...there is no side they are both wrong. Step back and learn what not to do in both cases.
Sue...good luck