I don't know your entire situation, but I've found that many people react awkwardly to stuttering because they are uncomfortable and try to defuse their own uncomfortability with lame attempts at humor. It happens to be all the time when I introduce myself to people; they say "oh you forgot your name" or "are you sure?" They best way is to just press forward, and eventually they get the hint. If not, saying something like "I stutter. Give me a second." works wonders. If they still don't get the hint, something like "I appreciate the help, but I got this. The best thing you can do is just wait patiently." I'm a high school teacher, so I'm used to performing in front of a semi-hostile audience. However, after many years of teaching, I've never had one problem with that was oriented around my stuttering. I credit this to the fact that one of the first things I talk about on day one is what stuttering is, and how they should react when I get stuck. After a couple days of nervous giggles, the kids adapt and begin ignoring it.