I used to tell my son that where there is one lie, there is no truth.
I too would rather face a hard truth any day, than be lied to and not know what I was facing.
That said, it will take time for her to change. Finding lies unacceptable to you may be a good lesson for her to begin with.
There is a lot of damage to mend when an addict gets clean. Sometimes it can make the relationship stronger and sometimes the damage is too destructive. I hope you two can work through this and find some joy again soon.
Hugs