Hi Justin
So sorry to read your post and hope that you have found some support on this blog. What you are going through with your sister is very hard, stressful and emotionally draining. If you think it would help to talk with someone who understands what you are dealing with please contact us at The Icarus Trust.
We are a charity that provides support form people like you who are dealing with the addictive behaviours of a close family member. If you contact us I can put you in touch with one of our trained and experienced people who will listen to you and try to help.
Please contact us on help@icarustrust.org or visit our website http://www.icarustrust.org
All the best.