If something has to do with her sponsor, I'm afraid (like the rest of recovery) it is up to her to deal with the problem.  Part of the program is practicing the tools when things get rough.  So even if what's going on is outrageous or unbelievable or whatever, the only healthy thing we can do is to keep to our side of the street.  Part of our syndrome is trying to take on someone else's problems.  So situations like this are a chance for us to practice our new, healthier behavior.  Remember the only person you're responsible for is yourself, and the only person you have any control over is yourself.  And if the sponsor is behaving unethically -- that's still nothing we can or should interfere in.  What if our partner is having an affair with her sponsor?  (I'm just making up ideas here of things that could be spectacularly a bad idea.)  Just like drinking, she needs to find her own way back to health.  That doesn't mean that we have to put up with unhealthy behavior in our house.  We can set boundaries as to what we will do to protect ourselves if unhealthy things are happening.  But that's the extent of our power and our obligation.

Do you have your own meetings and your own sponsor?  That would be a helpful source of support if things are getting complicated.  I hope you'll find a meeting for yourself.