No.

something else that I have thought about it that this kitten used to follow
my cat about and even sleep near her in my back garden in summer when my cat
would go to sleep in the grass. at the time I thought it was cute, she was
almost treating her like her mother.

my girlfriend thinks that it might be because:

a) our cat is not aggressive at all, neither of us has ever witnessed any
aggression from her. if she gets annoyed at to much attention she will just
get up and move.

b) our cat has grown up without any other cats in the household, the kitten
was the 3rd cat introduced into a house that already contained a fully grown
cat and a slightly older kitten. so maybe my cat is not used to having to
fight and be aggressive where as the kitten may have been bullied by its
house mates and "toughened up". she also mentioned to my just known that the
guy who owns the kitten has said that at first the kitten was bullied
especially by the older kitten, but now it actually bullies the older
kitten. so maybe this kitten is just naturally aggressive.

I thought that it was male cats that were more aggressive and that female
cats didn't really challenge each other.