Originally Posted by
ScottFromWI 
I'd just tell her you need to move on. It seems as though you don't have trust in the relationship and you admittedly have only been working with her for 4 months. Don't make it into more than it is.
Agree. And while it might be tempting, or you might mean to come from a place of concern...I would NOT bring up your suspicions/info that she has relapsed. Keep your recovery separate from hers.
Keep going. Best to you.