Hi Jewel,
You wrote:
"My sister and I have come a long way together and I am feeling sad."
I would disagree with that statement. Doesn't sound to me like your sister has come as far as you have. You don't want to drink...she does! One of you made more progress than the other.
If a relative or friend of mine came to me and started trying to punch holes in AA and telling me they wanted to drink again, I(have)would tell them to have fun and give me a call from time to time. That might be hard to say to your sister but you have to protect yourself. She's got you all spun up here. The Big Book talks about people who don't want to quit in "Working with Others." Sounds to me like your sister fits the bill. Our job is to carry the message, not the mess. Dump the load and just don't drink.