O.M.G
I feel for you! you have sooooo much on your shoulders now.
Are you sure she is Preg??
make sure first.
This may feel like the end of the world, but its not.
How old is the boyfirend, is there a boyfriend.
make sure you are with her when you confirm the preg test, and or go to the doc with her.
Once you have done either or these, you gotta tell your mum. Mums knows best.
Its going to hit the fan HARD at first, but you dont know what is going through your mums head, she may say yes after a while and help her go through this or she will help her do what she has to do>
Your sis is sooo young, how is she going to feed this bubba or even buy nappies. oh gosh girl im thinking of you both.
Make sure she is preg first before you go telling anyone, and i would keep the father of the baby away from the house for a while cause i know mumma is gonna wanna kick his butt. HARD.
You cant keep this a secret too long or you will loose your mind and loose all trust in your mum. Your sister has prob lost trust all ready, just be there for her and your sis cant hide it either its going to show sooner or later, but make sure you tell your mum straing away, dont wait.
this is not a little white lie about spilling raspberry on the carpet or breaking an ornament.
This is the BIG one, there will be tears but it will all be cool in the end, it always does.
Good luck with this and i sure will be thinking about you and your family over the next few days. x x