You didn't give us much information to go on. However, it is up to your parents to decide what they are going to do with their 18 year old daughter. You could suggest holding a family conference without your sister present and you or other siblings in your family could express their views to your parents. That's a good start.
This is a nice thing and no problem with it. I hope he keeps it up and acts as her protector as they both grow older.
he doesn't have a 15 year old sister. :)
family dollar nthat is where i got my mother's clothes from
no my sister did
legally, i think so, but it depends on how mature they are
yes they will have to be brothers or sister yes they will have to be brothers or sister
No
tell on them
49
I'd recommend talking to your son directly. This is a family issue is it not? A 17 year old runaway problem is a problem that should be solved by the family, not the district attorney. My appologies if that sounds like a value judgement. It's not.
As long as you do it as brother and sister and not as lovers, yes.
Rodger is 4 years old,Roger is 4, his sister is 2, last year Roger was 3 and his sister was 1.