Mine is supportive when he needs to be. We have discussed what I prefer when it comes to having blocks in public/with strangers etc. He knows to never finish sentences and words for me as a general rule, but sometimes when I'm really stuck or just fed up, I can shoot him a look and he will help me out. I tend to stutter a lot when we argue and he knows NEVER to cut me off or finish words for me in this sense. I think it's important to set guidelines for our significant others who are with us a lot of the time. We've been together for 7 years and honestly haven't talked about my stutter in years (other than me occasionally venting about have a bad stutter day), but it was an important conversation to have in the earlier stages of our relationships. If you feel comfortable, have a conversation with her about how sometimes you might like help or what you prefer. I don't love her comment as that is frustrating in the moment, but my guess is she was trying to be supportive in the way she thought was best.