Because her 3yo has been saying it, and she thinks the only person she knows who uses the word is me. She isn't happy.
Now, I'll hold my hands up and fully acknowledge that not everyone considers the word bugger to be an innocuous, and at times endearing, way to refer to your children
And in any other circumstance I would have profusely apologised.
Except... her 3yo swears like a sailor
seriously, the kid swears more than me. We all went out shopping together once, me and her and all of our kids, and he spent the entire time hollering FUUUUUCCCK CCCUUUNNNTT from the back seat. She said it's because he hears her swear all the time.
AIBU in thinking that the odd utterance of bugger is the least of her worries, and that she is taking the piss a bit in getting so annoyed with me? She hasn't stopped swearing, she isn't making an effort to stop him swearing. This telling-off has come out of the blue!