I’m sorry to hear that you and your fiancée had to go through that experience must have been hard unfortunately it does happen, a lot of ppl lack self awareness when it comes to stuttering, I she doesn’t this experience affect her mentally in the future, in the future if something like that happens again your fiancé should be more “why are you laughing I have a stutter” that usallly silences them( this works for me) maybe it dosent work for your fiancé, just try not let it get to her I know it’s hard coz ive had situations like that and it’s painful and upsetting, if it happens again speak out tell the person ( I have a stutter dont laugh) this is what I would do. Try to comfort her as much as possible I know it will be hard coz she just think ur trying to make her feel better which you are. But if that was me I would tell on her (the server) look I have a stutter so what don’t laugh at me, but thats just me, if you would like to talk more about it dm me ;) I’m happy to help you and your fiancé.