As a guy in his early 30s who had alot of experience with this in my late teens til mid 20s but have been out of the game for awhile..I can say for certainty she doesn't understand fully. If you only have a mild stutter but can get the words you want out gracefully then most girls won't care unless they're complete bitches..on the flip side if your a severe stutterer that spits when he talks or gets blocked so badly you sound flat out retarded then in my experience just don't even bother until you get better somewhat with your speech...sure there are a few great kind hearted girls out there that won't care even if you sound horrendous..but most of the time it will be a bad experience if your not confident you can keep it to a mild to moderate stutter & not make a scene. And she asked you if your autistic?..really? That's a little fucked up tbh lol. But I understand why she's asking. But like I said she probably has no clue at all what a real stuttering disability is. Being good looking and in shape helps somewhat. But communication is everything...since you say your a mild stutterer then you should be alright...hell back when my stuttering was moderate in my early 20s I got 2 relationships with good looking girls that I thought would run the other way when they heard me choking on my words but it worked out in the short term. So all in all you'll be alright