The best you can do is to treat her like normal, unless she states otherwise. My girlfriend and I have a deal, if I need her to speak for me, I just give her "the look" and she takes over. Tips and tricks from a non-stuttering person, however well meant, is not helping. "Try not to think about it".... Yeah, sure. Thanks. That has never occurred to me in 30 years. I realize that in 9/10 times, these tips come from a good place, but more often than not they are more annoying than actual helping. She will most likely open up to you about what you can do when she's ready. From what you are describing, you are already doing the right things.