Can I ask this question, it's quite important.

Can I ask this question, it's quite important. Ok, so I work in an environment that you would think it's still the 1970's mentality. I'm in England btw. There is a guy, that when he speaks he has quite an issue with his stammer/stutter, when he is in conversations. Now when I've been present hearing him, there is always this woman, that literally copies what he does, repeating and gets a good laugh out of it what he says all the time, she thinks it's really funny, I don't! To me, it's really annoying what this woman does and I find it hard to bite my tongue, this guy just puts up with her doing it. Personally I want to tell her to STFU, if you know what I mean. Shea the wife of one of the bosses and she's a loud mouth, with an opinion in absolutely everything and corrects everyone all the time, thinking she's always right I'm trying to keep my mouth shut here, as I've not been there very long, whilst them 2 have. What do you recommend here, I'm sorry but although he just sits and takes it, I hate what she does, she's a bully imo and I don't speak to her. I don't mean to offend anyone here, I just hate people like that, to me, it's not me having a sense of humor failure either, it's like the guys are scared of her!!