thanks - I'm not sure what I should do yet, but making her a british girl seems more interesting. I'm probably going to write "I loved her as if she were my real mum"
Probably a British girl would be more likely to say 'I loved her as if she was my own mum'. Otherwise there's a slight discrepancy between the formal 'were' and the informal 'mum'. Or you could have 'were' + 'mother'.
For the thesis statement, if you want to include the 'was I wrong' part, you have to have a connection between it and the main sentence. There isn't
My uncle is British and I have noticed that he often fails to use "I" in the genitive case, but instead (incorrectly) uses the accusative. In other words, he often says "me" when he should say "my", for example:
It's me own fault that I'm so broke.
So, I think that Grace would be quite accurate in having her British character say:
Yes, both those versions could be heard; though since they would identify the speaker as a member of a particular social group, her other speech patterns would have to be consistent.
By the way, taiwandave, your screen name has an interesting 'Necker cube' effect: switching between 'taiwan-dave' and 'taiw-and-ave'.