My 13yo DS has had a girlfriend for a few weeks and I was shocked last night when she asked him to stay over at her house, in her room. I told him that I couldn't let him stay there and he got offended and said was I calling her a slut, as she had only suggested they share a bed for the night, not have sex!! I am sticking to my guns and still saying no as I don't agree with teenagers sharing a bed at this young age, but I was wondering what do other parents do with teenagers of this age? Am I being old fashioned or am I right to refuse permission?