In general bro girls & other guys mostly care about the stuttering. It's just a fact of life. Now but some also don't occasionally..in reality a few things could have happened. She could be getting tired of you or loosing respect for you for what ever reason. So she's shit testing, I've had it happen to me before. She also might of just wanted to see how you reacted to see if your "still the man"...IMO girls that shit test you about a uncontrollable handicap are cold pieces of shit that will flip on you in a heart beat once they're tired of you imo. Don't even worry about it. If she brings it up again tell her if it's really a problem she can go disappear. Fuck that shit. Even though it's a horrible handicap most ppl don't give a fuck. So look out for yourself bro.