I was angry with my exA when he stopped drinking. Not because he's stopped, I was delighted about that. I was angry because he expected me to just forget everything he'd put me through and act like none of it had ever happened...and then he wondered why I was resentful and bitter.
It's fab that you're sober, please concentrate on that but remember to try and give your other half some time to adjust.
Another factor that could arise is her being scared of relapse and as a consequence of that fear, she walks on eggshells around you. Once it stops it's like we can finally exhale but I was too scared too. I didn't know what to expect, what to say or how to act around him for a while...