Does this seem a bit bitchy or just a harmless joke?

[Everybodyslookingforsomething]

We met up with a school friend of mine and my partner. We were talking about camping and my partner joked about when we'd had a bit of a squabble one day as we'd ended up lost and in some sort of swamp in torrential rain so tensions were a bit high.
For some reason my friend just went, "Yeah I can totally imagine Everybodyslookingforsomething being like waaa waaa waaa arguing etc' basically doing that mimicky high pitched voice thing when you do an impression of someone.

It just came out of nowhere, I've never had any sort of argument with this friend that I know of, maybe when we were 12?
And prior to this boyfriend I hadn't had one for 5 years, he was abusive so that's different maybe but with my current boyfriend and the one previous, I'm not really argumentative, we have occasional disagreements like many couples but I'm not the bickering sort?

Anyway it just really came out of nowhere, she mimicked my voice and made me out to be something I'm not? Or am I just overthinking it? I just laughed at the time and won't mention it again but just found it odd, like she wanted to make me look bad to him?

Yeah, it was just weird. She's probably just insecure..I'm also used to stuff like this.
Once years ago, when we were about 19, she kept saying in front of everyone that I had been 'all over' my boyfriend. I was only 19, and it was my boyfriend, we were likely drunk. It just seemed a bit sly

Could she fancy him a bit?

She's married, but yeah she probably does. Wouldn't be surprised

Yeah that was my first thought!

Feel bad for her husband if that's how she is

My thoughts too!

Yeah, that seems shitty to me.

I think sometimes people might rib their partners a bit in front of friends, and then friends will sort of defend the partner by ribbing the friend a bit to make the partner feel more included, if you see what I mean. But this doesn't sound like that at all - it sounds much more like what @winterlilies said.

I've only had one friend in my life who did this kind of thing and unsurprisingly, we are no longer friends

Hope did your boyfriend react?

I honestly couldn't be bothered with someone that thought that was a reasonable way to be.

She put you down in front of your partner- it's insecure, immature and any other negative adjectives beginning with "i" !

You don't need to pull her up on it necessarily, presumably your partner thought her reaction a bit idiotic (basically trying to point score or take sides) when he was recounting a humorous anecdote about camping.