Oh please, grow up you lot.
Uniform Juliet,
by the end of the year the housekeeper will know your girlfriend's name and formed an opinion as to whether she likes her or not - just like your mum. The housekeeper (Anne, if she is still there) willingly turns a blind eye to partners staying in rooms just so long as it doesn't cause trouble. One person in my corridor had the demon boyfriend form hell, and Anne didn't enforce the 'no partners' rule, instead she provided a shoulder to cry on.
Mr Pandora spent 1 or 2 nights a week at Oats, and even came for a weeks holiday, although he did complain the beds were a bit small.
You'll have plenty more things to grumble about at Oats, don't start with who you can have in your room.