Only a recent occurance but for some reason it bugs me! DD has a good circle of friends - about 5 or 6 of them and they have had the usual fallings out / squablings / who is the best friend type stuff that 9 year olds have (year 4).
She is friendly with this girl but not exclusively so and never mentions her much at home, but this girl lives in the same road as us (unusual as the school is 10 min drive away) around the corner.
This girl has taken to coming to our house after (her) tea every evening and knocking for my DD. It is bugging me as a couple of times when we are leaving school she shouts over - £I'll be round later you are not doing anything are you" - DD kind of nods but I interject and say firmly that we are busy that night, may be another night in the week. She then questions me as to what we are doing and will it really take all night - very foreful 9 year old she is! I have taken to turning the door bell off so we cant hear it 
It bugs me mainly because I have a 4 year old and while I dont mind DD being in the front garden (I dont let her wanter up and down the street and regularly peep out to check they are ok) and I do not have a problem with her parents being more liberal and letting their DD be on her bike out of site of the home - but it is often an hour or so and then she is wanting to come in and play, etc. It is not a quiet street traffic wise even though it is residential and I dont like her being out there. The other girl appears to be more streetwise and seems to be away from her home for hours of an evening - never often see the parents passing by to check where she is. She does not have a mobile!
When we get home from school I have a routine (varies due to after school club and the like) so same days we dont get tea until 6pm and I like the kids in jarmies by 7 and chillin down for bed at 7.30 and 8pm. There is also homework to be done and it works better getting it done before tea.
I know I am being a little controlling but AIBU to expect 'My House My Rules' and that if I want DD in the house of the evening on a school night its up to me! It is different if it is a pre-arranged play date where the child is invited to come for tea for a coulpe of hours but she just turns up when she feels like it.
I try not to embarass DD be calling her in for her bath or such as I remember the fun I used to get poked at me when my mum did the same! I try to be discreet but the girl then questions what I need DD to do! I just feel like telling her to bog off and stop bugging me! Obviously that is not acceptable behaviour towards a 9 going on 19 year old!
Anyone been there before and how do I resolve it sensitvely? This girl has caused trouble in school before trying to split up a friendship with DD and her friend and I have experienced the same DD be a pain with DD at her birthday party causing a scene with her mum who had come to collect her 5 mins early - that was embarrassing for the other mum.
I can see it only getting worse as the summer holidays get closer as she will be pestering us all day every day we are off. I just like to slob around in an evening not having to keep an eye on them outside.