That's the nice scenario. But let's say her response sounds like this:
"You know, this is not the first time that I have heard something like this. When you decide you want to be honest with me, give me a ring. Meanwhile, I have some thinking to do."
We may conclude that the recovering addict does not have right partner. As this point, at least you know the truth and have created an appropriate place to stop investing in the relationship. You are slowing down that process to find safety for yourself and for the relationship if you think it is worth pursuing.
Even though this painful scenario is not far-fetched, my clients who are walking the path of recovery usually find that honest intimacy in communication has good results.