But mom, I did what you requested

it's sottish, i've seen this post floating around tumblr!

slang used in scotland, i mean

How do you know their Brits? Many countries say 'mum'. Australia and NZ for example. Or is what Americans call other English speaking countries beside America? Not trying to attack you, just curious!

Does it really matter? And its they're.
The fact that she said Ta instead of thanks shows that they're in Britain.