Rant vent

Hi IMs I think this is more of a vent then a question I will try to keep it as short as possible ...
Here it goes I have a younger step sister who is a drug addict compolsive lier and a prostitute but ofcourse she's not that's what her dad believes anyway about a year ago the shit hit the fan when she came to live with us do detox and go to rehab that was the deal (I live on the same block as my parents) so she came up we were all supportive to start with she then sat out side one day boasting about her $800 a day habit I was shocked and went to my mum as I was pissed off with them for not informing me of what was actually going on as I have kids to worry about so then she took off called my family a bunch of dogs and went back to where she lived then a few months later came back none of us wanted her here the deal once again was to book into detox and rehab ofcourse nothing more lies spun to her dad the he believed she then went around telling all of her family that I was the one with the drug problem and was pissed off cause they helped me and they won't help her ( for 1 I have never touched drugs in my life and I never would ) I was really hurt by what was said about me and even had docs call me about this which I was fuming about I had nothing to hide so docs came and went with no problems if anything they were pissed off for having there time wasted so the price of s$&t left again after a huge blow up and now I find out that her dad and paid for flights to come back up here again apparently not to stay here but around the corner which has already cause strain on my family and she isn't even here yet. I don't know how to deal with this I am still pissed off about what was said and what happened with what was said any tips???...... Sorry for the long rant and I hope it makes sense lol