I don't live close to my family, around 2 hours on the train (5 hour drive).
My mum tends to have a habit of coming to stay and just staying for weeks on end. Last time she stayed was for 16 days.
8 weeks later she's staying for 11 days (baring in mind DC are at school in this time so interrupting their routine so to speak.)
I love seeing her and spending time with her but it's just so long. After a week I've had enough and want my own routine back, I can't sit and read while the kids play, can't even do my housework in peace without her trying to take over. 
DH doesn't mind her staying but it's a lot.
She's still here for another 3 days and she's already on about coming again at the start of December for a week!
How long does your family stay? Am I being unreasonable thinking over a week is unreasonable to expect to stay with us?