I like what Cynay said. There are many other issues even if she finds true sobriety this time. I am on that journey of discovery right now. I truly believe that my husband is sincere and committed to his recovery. That does not automatically mean we can have a relationship again. When I start thinking about all the "what if" I get knots in my stomach. I just have to trust that being the best me I can be will bring it's own rewards. Whether that means a loving committed relationship with my husband remains to be seen. Keep doing what's right for you and your life. Wondering what will happen with her will only give you extra anxiety you don't need.
Much easier said than done, I know.
L