Wow!!! That is a great plot line!! One problem though. There are a bunch of grammatical gaps or errors and some punctual mistakes.
I also wanted to ask, where are the moments when the girl's friend couldn't speak, had to step back, and come at it a moment later?
Could she be fingering the gun while she talked? That way the audience (readers) would know that something was in her pocket but didn't know what exactly it was. Something like explaining the hard, cold metal would've sufficed.
Great job on the plot line and I am excited to read more of your work!