BIL's new GF laughed at me and called me weird - AIBU

She sounds not your cup of tea or on the same level

She sounds immature thinking animal mating noises are funny.
Time will fix that.
Be kind just because you know about the foxes she obviously doesn’t.

It sounds like she was nervous and her nerves just bubbled over. I think it can be pretty normal to laugh inappropriately or say stupid things when you're anxious.

She sounds very immature -that's like something a young teenager would say.
I'd give her another chance and go along. If she's a twat you can avoid future social events with her beyond the necessary. Maybe she felt nervous and it came across as rude? Maybe she was going for "banter"?

This. I sometimes cringe when I think of some things I said in the past, when feeling out of place, or nervous.

Totally get what you're saying. I think it's just something I'd probably never say- like to be able to identify one animal over another's mating call. I'd probably just say it's a fox making noise/crying etc not a fox having mating/sex. People grow up in all sorts of environments and with different experiences, I would imagine most people wouldnt know about different animal sex noises or talk about it at dinner. I can see why she thought it was a bit weird or funny.

I totally know I'm immature but lifes more fun like that!

She was incredibly rude and free time is far too precious to be spent with rude people!
I would decline the invitation.

Or you could always use the mnet standard phrase 'did you mean yo be so rude' the next time she harps on.

I don’t waste my time with rude, gauche people.

By socializing with them, you’d be giving BIL tacit signals that she is welcome. That could prolong the agony.

YANBU for feeling that way. If you've ever lived near foxes of course you get to know what their mating very sounds like, because they keep you up by doing it in the street every night, and certain times of year. By year 2 or 3, you'll know it happens at the same time every year.

But YWBU to hold it against her. Everyone fucks up occasionally, and she could end up as your SIL. Your life will be much more pleasant if you can find a way to get along with her, especially if it's a one off.

(That's not too say you be a doormat if she keeps this up.)

Anyone who lives near foxes will know the sound. They make a bloody racket. The OP was able to quickly reassure her child about the noise because she is not ignorant of the world around her. I think you and the new gf are the weird ones here, not the OP.

Well she sounds like a fucking idiot and your brother could do a lot better. I'd go and drop lots of random wildlife and non wildlife facts to out her as a dumb towie idiot.

She sounds a bit of an immature womble tbh but maybe another chance.

This. GF sounds like a right cow and pretty unsophisticated!

Was alcohol involved?

I think that you are being over sensitive to someone who was probably incredibly nervous and trying to join in the conversation (especially if alcohol was involved).

Try again on mutual ground and try to find out what she’s into obviously not wildlife. You might like her!

Nothing weird about it if you’ve ever heard one, thought “what the hell was that ungodly sound?”, researched and figured out what it is. If you live somewhere where you can hear it, you grow to know when to expect it. Knowing when birds build their nests is the same.

I’d probably go and see how she behaved this time. I don’t think it sounded like she was nervous, rather she sounds like she knew exactly how she’d come across if she’s eye rolling you in your own house. However the alternative is what? Never see your brother if he ends up sticking with her? I guess you don’t have to be best friends and maybe this is just the start of you learning to tolerate her.

This 100%

She sounds as though she might have been trying - in an over the top way - to make other people laugh?
I'd give her another chance, as others have said she might have been nervous and socially inept. When you've had another chance to meet you might be better placed to make a judgement.

I think go, but look up a whole load of sex-related animal facts and drop them randomly into the conversation.

Give her a chance but don't let her make you feel uncomfortable - is she shy? Apprehensive meeting her boyfriends family?

My response woukd have been blunt

• well everyone is a bit wierd in their own way, but I least I have manners and don't try to embarrass others by pointing it out.

Given it was the first time you met her I'd give her one more chance and see how it goes. I think given she could be a future SIL, you could give her that. I'd also let your DH know this is another chance but you won't give her endless opportunities to be rude.

I think that shy, socially awkward people can sometimes come out with some strange things and might come across as rude occasionally. I've been like this before- been quiet and shy and then come out with something odd because I don't know what to say. Maybe she was just trying to have a laugh?
Honestly, I'd give her the benefit of the doubt on this occasion and see how it goes next time.

I'm with you OP. I don't see what she said as nervous clumsy conversation. If she'd said it once perhaps, but she repeatedly said things and pulled faces to mock you, in your own home. I think she sounds like a bit of a prat... But there is a small chance it was nerves.

On that basis I would go out with them, because you'll know for sure by the end of the meal if it was the former or the latter.

Give her another chance, what are you going to do just never be around her again? She was probably just being weird cause she was nervous.

Although tbh I'd find it a little weird that you said it was a foxs mating cry. I dont know why and wouldnt say it to your face but I do think it's just an odd thing to be able to identify and be interested in when animals mate.